#uncle plugged the old thing in and this child is drawing on paint as if her life depends of it!

[chiptrillino]

nothing is more humbling then a 8-years-old telling me i don't know how to draw and then demands of me to draw power puff girls for her all afternoon long!

[absolutepokemontrash]

MC is Half Demon and They Look Awfully Familiar

(Underground Tomb edition!)

Hello friends and degenerate sinners, this is basically a mini headcanon set for Luci’s kid!MC about how the incident with Luke and the Grimoire would go down in this AU to tide you all over until Part 3 comes out! Enjoy!

It was a normal night in the good ol’ HOL... Lucifer was doing paperwork at an ungodly hour of the night, Beel was in the kitchen, and Mammon was screaming and running for dear life. Ah... sweet normalcy.

The custard incident remained the same, MC got force-fed custard and Beel threw a truly fantastic hunger tantrum that culminated in the wall connecting to MC’s room collapsing.

Cue lecture from Luci-father.

“I am very disappointed in you three.” Lucifer rubbed his temples as MC, Beel, and Mammon awkwardly stood in his room. Mammon of course, was trying to avoid the death glares MC was giving him. Poor bastard.

“Especially you two, MC and Beel.”

“Whuh?!” Mammon sputtered. “What about me?!”

“I expect this from you. These two on the other hand,” Lucifer raised an eyebrow at MC who was awkwardly trying to suppress a laugh at Mammon’s aghast expression. “Should know not to act like this.”

“We’re *snrk* sorry, father,” MC paused to try and muscle through a giggle. “It won’t happen again.”

“He ate my custard...” Beel pouted.

“So, MC won’t be able to use their room anymore due to the wall... collapsing.” Lucifer gave Beel a pointed glare.

Mammon smirked, and if he were sitting on a couch, we would have leaned back and kicked his feet up. “Well, obviously since I’m a kind and generous soul I’ll open up my room for poor MC to stay in. My babysittin’ rates are quite high though-”

“BABYSITTING?!” MC snarled, giving Mammon a death glare that could probably kill lesser demons.

Lucifer felt a twinge of pride upon seeing his child give someone his signature bone-chilling glare, if he weren’t supposed to be disappointed he would have given MC a pat on the head and let them hang Mammon from the ceiling.

“Uh- heh- MC, I’m your favourite uncle! Me babysittin’ ya should be an honour!” Mammon was sweating bullets and desperately looking to Beel for help.

“Levi is rapidly approaching favourite uncle status.” MC crossed their arms and huffed.

“Levi?! Wait- does that mean I was your favourite-”

Lucifer was almost tempted to stick MC in Mammon’s room just to have MC punish Mammon so he could get some sleep, tragically, his common sense won out. “MC will be staying with Beel. He has an extra bed in his room after all.”

MC looked over at Beel and smiled. “Could be worse, right? I’ll replace the custard.”

Beel’s smile upon hearing the last part could have lit up the entire Devildom. What a sweetie.

MC still chilled in Beel’s room. They finally got to ask more questions about Belphie, and Beel is more inclined to share what’s up because MC is his big bro’s kid after all!

Because of MC’s half demon-ness, they hadn’t met Belphie at that point in the story unlike in canon. They were just curious about their missing uncle. They ALSO already knew what Belphie looks like because Lucifer gave them an in depth tour of everything and he pointed out all the portraits.

MC, being the sadistic sweetheart they are, went out and bought themselves and Beel replacement custard. MC made sure to eat it right in front of Mammon.

But my oh my, who was texting them? *gasp!* Luke!

MC obviously let their little angel buddy into the house (Luke did not know about MC’s parental situation at that point, keep that in mind). Luke was fun to tease a little after all! And it was nice to have another kid around, but MC would never admit it.

Since MC had literally no reason to be afraid of their dear old dad, they went right up to him and asked him if Luke could stay over. No fear.

“Father?” MC leaned on the doorway to the backyard, Lucifer was playing fetch with Cerberus. MC had never seen someone play fetch so robotically.

“Yes, MC?” Cerberus’ middle head dropped a slobber covered squeaky toy into Lucifer’s gloved hand, the other two heads snapped at the middle one.

“Can I have a friend over?” MC asked, trotting over to give Cerberus some pets. On the first day the dog had tried to eat them, but after giving him some much tastier bacon treats, Cerberus was sweet as pie. Murderous and dangerous pie, that is.

“Do I know this friend?”

“Yes, it’s Luke. Can he stay over?”

Lucifer wrinkled his nose and rolled his eyes. “Cerberus is right here, you have access to a dog. Why on earth would you bring the chihuahua over?”

MC snorted and gave Cerberus’ right head some scratches behind the ears. “He’s not a chihuahua all the time, come on, it’s for the good of the exchange program!”

The two had a stare down for a little while, and to his absolute horror, Lucifer felt his resolve cracking. This child of his was too adorable for their own good. “Fine, MC.”

“Yes!” MC fist pumped as Cerberus’ middle and left heads tried to join in on the ear scritches.

“But note,” Lucifer continued. “I expect a full report to give to Lord Diavolo on this whole experience.”

MC frowned and debated sticking their tongue out at their father, they decided against it. “A paper? On a sleepover? Really?”

“Yes. Really.” Lucifer gave MC a flick on the nose. “Like you said, it has to do with the exchange program. Now go make sure the chihuahua doesn’t die and leave you with a mess to clean up.”

The look of complete terror Luke gave MC when they told him that Lucifer said he could stay over was completely worth the paper they were going to have to write.

“What?! You weren’t supposed to tell him I’m here!”

“He said you could stay.”

“Why?! Oh no... did he demand your soul as payment or something?! MC! You shouldn’t have put yourself in that nasty demon’s debt! Don’t worry, I’ll get your soul back somehow.”

MC should have been offended... but they weren’t. I mean, could you stay mad at Luke when he just offered to fight arguably the second most powerful demon in the Devildom to get your soul back?

Now that Luke’s presence in the house was known to everyone, the challenge was no longer keeping Luke hidden, it was making sure Luke didn’t say anything that would get him killed and making sure none of the demon bros made Luke cry.

Mammon was the main culprit of the teasing because Lucifer actually had better things to do. And he had a (totally not a) date with Diavolo so he’d be back late and wouldn’t be home to tease the chihuahua.

Mammon’s status as favourite uncle was hanging by a thread by the end of the first day.

Asmo thought Luke was positively adorable and also very annoying. He offered to paint MC and Luke’s nails. Luke declined, but MC was all for it. (Their cuticles were a MESS by the way, they needed the manicure.)

Luke’s nails were painted gold to match the gold on his outfit! Asmo was quite proud of his work, and was very offended when he was not allowed to try and braid Luke’s hair.

“It looks so soft!”

“You’re not allowed to touch my hair, demon!”

Satan still disliked MC on the basis that they were just a mini-Lucifer and hung out in his room or the library to avoid them and Luke.

It was incredibly annoying when Luke and MC burst into the library to look for cookbooks and treat recipes after Luke told MC about his baking endeavours. Satan debated ordering a pair of ear plugs on Akuzon...

Or perhaps a laser gun...

Both would make him stop hearing the children’s grating voices.

“You two, be quiet.”

“We haven’t spoken since we got in here...”

“You’re breathing too loud.”

Beel remained the only brother who was actually decent to Luke, they all played Go Fish in Beel’s room.

Levi was in his room playing his new video game just like in canon, but he could hear Luke and MC running around outside his room.

He was fully prepared to do that introvert thing where you stay in your room until you hear someone say goodbye to the guest.

Levi’s eyes were glued to his computer screen, just eight more skeleton monsters to kill and he’d get the achievement! His attention crumbled the moment he heard the dreaded sound of...

Guests...

“Hey MC! Whose room is this?”

The sound of a door opening and closing down the hall caused Levi to jump in his seat. Oh no... his worst fears were realized! There was another person in the house!

“That’s Asmodeus’ room. Luke you shouldn’t go around opening everyone’s doors-”

The sound of another door opening and shutting made Levi pause his game and look at Henry 2.0 for help. Maybe if he jumped into the tank and wrapped himself in his tail he’d camouflage into his surroundings...

BAM!

AAAAA! Not enough time! The guest was drawing nearer... he was going to have to... *barf*... SOCIALIZE!

“How about this room?”

Levi braced himself for the incoming social contact... Fs in the chat everyone...

“We shouldn’t bother Levi, let’s do something else.”

HAJEKDJSJSJSJD- BEEL! BEEL JUST SAVED LEVI’S LIFE!

The poor third born slumped back in his seat, the awfulness of socialization avoided. He uh... hadn’t actually left his room in maybe three days... maybe he should actually go outside... enjoy the nonexistent sunlight, y’know?

...nah. Levi went back to his game.

Since the kitchen was broken, Beel, MC, and Luke went out and get AkuDonald’s. They were all out of the toy that Luke and MC wanted so that trip was a disaster! A disaster I say!

Just the image of Beel happily chomping on his eighth burger while Luke and MC angrily pick at their fries makes me want to laugh.

Now the question you’re all waiting for, did Lucifer try and kill Luke and Beel and then MC for trying to take the Grimoire?

N O

“Whose room is behind that door?” Luke pointed to the door to the attic staircase.

MC shrugged and hit their knuckles against the door a few times. “It’s just the door to the attic. My uh- Lucifer said not to go up there because it’s just full of old junk.”

Normally MC would scoff at the idea of being told what not to do and do it out of spite, but MC was a child, and like most children, they hated scary attics. They hadn’t even attempted to open the door in the month they had lived in the house.

“Hm, maybe he’s hiding something...” Luke puffed out his cheeks and knocked on the door. When met with no answer, Luke turned the doorknob. The door creaked open, and the two peeked inside.

A tall spiral staircase greeted them as they tentatively stepped inside. Not so-good Lord, the room was freezing, but it didn’t seem to bother Luke as he walked further into the room.

“What do you think’s up there?” Luke asked, craning his neck to try and get a look at what could be at the top of the stairs.

MC shuddered and crossed their arms. “Like Lucifer said, junk. Nothing important.”

There was a tingling feeling at the base of MC’s neck, their hand flew to the spot only to find nothing, but the uneasiness didn’t cease. Something was very... very off. A shudder creeped up their spine as Luke stepped closer to the staircase.

“Come on,” Luke tutted, placing a hand on the railing. “Demons are known liars!”

Luke was quite difficult to be friends with sometimes, MC had to admit.

With every step Luke took up the stairs, the sense of dread brewing in MC’s gut grew, but they remained rooted to the spot, it was almost like something was physically stopping them from getting closer to those stairs.

Luke stopped on the sixth step and craned his neck to look up again. “Hello?” He called out.

His little voice echoed up the staircase, he was met with no reply for a moment, until a massive shudder wracked both his and MC’s spines.

“Hello.” A voice replied.

Quick as lightning MC dove forward, taking three steps up the stairs despite what felt like electric shocks stabbing into their skin, and yanked Luke back down the stairs and out the door, closing it behind them. MC heard a lazy, carefree chuckle reverberate through their head, and a message that only MC could hear.

“Leaving so soon, Lucifer?”

...

Spooky right?

Anyway- back to Luke and MC being idiots together.

They headed back to Beel’s room to watch some Devildom kid shows, I assume Tom and Jerry just played on repeat.

Luke explained the reason he ran away from Purgatory Hall, and MC legitimately debated whether or not they should throw Luke out of the nearest window for all the jabs he was taking at demons.

“Simeon was going to go out for tea with Diavolo! He even said that I could ask Barbatos to instruct me on the finer points of baking!”

“What’s so bad about that?”

“They’re demons, MC! Simeon and I are angels from the Celestial Realm! We shouldn’t be consorting with demons.”

Once again, bless Beel and his lack of murderous rage when it came to anything other than food.

“MC, Lucifer would be upset if you broke a window.”

“What’s he talking about?”

“Nothing Luke, nothing you need to worry about.”

Don’t worry, no angels were harmed during the visit.

On day two of the extended sleepover, Luke and MC decided to go running around the house again.

“And this is the basement.” MC put their hands on their hips and kissed their teeth as they looked around the Underground tomb. “Perfectly creepy.”

Luke shuddered. “Is this house nothing but one creepy room after another..?”

MC smiled and stuck out their tongue. Their fear of the attic did not extend to the underground tomb. Not that they were actually afraid of the attic or anything...

“Why? You scared some big monster is gonna getcha?” MC teased.

“No!” Luke gasped. “I’m not scared!”

MC began to walk backwards into the darker depths of the tomb, their teasing tone echoing off of the walls. “Then come on! Don’t be chicken!”

Luke looked back and forth from the door out of there, to the rapidly disappearing figure of MC, he rushed after MC.

“I’m not scared of some dark basement.” Luke huffed.

“Why not~?” MC snickered. “There could be ghosts down here... tortured souls of those who were damned to Hell for all eternity~!”

MC swiped Luke’s hat and placed it on their head, Luke jumped at the sudden contact and began to try and get the hat back from MC.

“Stop trying to scare me!” Luke yapped, MC laughed and began to jog deeper into the tomb.

“Maybe there’s a monster that eats chihuahuas down here too! Who knows!” MC twirled the hat with their fingers and ran a little faster when Luke ran after them.

“I AM NOT A CHIHUAHUA!”

Sure, maybe it wasn’t the best course of action to tease and scare one’s friend instead of telling them what they said earlier was mean, but MC wasn’t the best at decision making.

When MC reached a dead end, they stopped and looked around, Luke crashed right into them. He managed to swipe his hat back from a now disinterested MC.

MC’s gaze landed on a book being held up by a statue, they padded over and looked up at it.

“Luke, do you know what that is?” MC asked, turning to look at their now very miffed friend.

“The... book? I don’t know.”

Truthfully, MC didn’t know either. During their first tour of the house, Mammon had interrupted the Underground tomb segment and Lucifer had to cut the tour short.

“It’s uh...” MC pursed their lips and tried to think of a convincing lie. “A spell book. Lucifer told me that it makes your magic really really strong, so he stuck it down here to hide it from Solomon.”

“Did I now?”

MC and Luke screamed and whirled around, there stood Lucifer himself, not looking terribly pleased with the two of them.

“MC, care to explain why you and the angel are so close to the Grimoire?” Lucifer’s words were icily calm, and MC knew that meant if they didn’t come up with a good explanation they’d be in big trouble.

“W-we were just playing down here...” MC trailed off, looking to Luke for some kind of backup before realizing what a stupid idea that was.

“Y-yeah! We were just-”

Lucifer stuck his thumb over his shoulder and glowered at the two. “Out.”

“Yes sir.” Luke and MC mumbled as they stepped away from the Grimoire, Lucifer relaxed slightly as the two walked past him and down the hall.

When the two got back up to Beel’s room, Luke suddenly gasped and turned to MC.

“You said it was a spell book!”

After that, MC got the feeling that Luke was no longer welcome in the house. What was the big deal about almost touching the Grimoire anyway? It could only override pacts and control demons-

Oh.

Balls.

Simeon got called to pick up Luke and before the two of them left MC assured Luke that he could come over and hang out anytime as long as he texted first.

Beel said Luke could come over and bake when the kitchen was fixed, poor Beel would have to do without Luke’s baked goods for a little while longer.

MC rested their chin on the coffee table they were kneeling in front of, stewing in annoyance. Their unfinished homework was practically mocking them, but the Demonology textbook was not what had them in their funk.

“MC, do your homework.” Lucifer said from the living room couch, he was comparing his phone to notes in a binder that was placed on his lap.

A grunt from MC caused him to raise an eyebrow. Their grasp on demonic language had improved, but Lucifer did not approve of them using their new skill to sass him.

“MC.” Lucifer chided, MC turned to look at him with a deadpan expression. “If there’s something wrong, either tell me, or do your work without complaining.”

MC turned back to their homework and tapped their pencil against the textbook, before puffing out their cheek and turning back to Lucifer.

“What’s in the attic?”

For the briefest of moments, Lucifer froze, he forcibly relaxed and went back to his work.

“Junk.” Lucifer replied. “Did you try and go up there?”

MC shook their head. “No, I went into the staircase room, but not up the stairs.”

Lucifer’s eyes flashed, he then took a deep breath and looked at MC. “Good, there’s nothing of interest up there anyway. If you did go up there you might break something or hurt yourself.”

“Okay.” MC sighed, trying to push the voice from the attic out of their mind. “What about the Grimoire? Why is it down in the tomb?”

Lucifer could feel his patience growing thinner and thinner with every question. “So it doesn’t fall into the wrong hands.”

“Why not just destroy it?” MC asked, their question wasn’t meant to be taken as an insult or be malicious, it was just legitimate curiosity. “Wouldn’t that be safer?”

The first born hesitated before he answered. He looked over MC, before shaking his head. “...I’ll tell you when you’re older.”

MC’s eyes narrowed, but they went back to their work all the same. It would be about ten minutes of quiet before MC spoke up again.

“When Belphegor gets back from the human world, you’re going to have a lot of explaining to do, huh?”

Lucifer’s eyes snapped up to look at MC, who still had their back turned to him as they scribbled notes from the textbook. His grip on his DDD tightened as he replied.

“Why do you say that, MC?”

MC didn’t seem to register their father’s clipped tone, and shrugged. “Beel said that he isn’t answering his texts or calls, and when he sent up a letter Belphegor didn’t respond to that either.”

“The life of an exchange student is a busy one, as you can see.” Lucifer forcibly injected his last bit of remaining calmness into his words as he gestured at MC’s homework. MC laughed at that.

“Yeah well, I still make time to call my friends and ren back up in the human world.” MC giggled. “And I’m sure those text notifications about his older brother discovering that he has a child would make him pick up the phone.”

“Belphegor might have a much larger workload.” Lucifer retorted, trying to keep himself from snapping at MC.

“But still, you’d think he’d call his-”

“MC-” Lucifer snarled, MC whirled around, the fear and shock in their eyes caused anything Lucifer was going to say to die in his throat.

The two stared at each other for a few seconds, before Lucifer took another deep breath and turned back to his work.

“Not right now, MC,” Lucifer whispered. “I’m working.”

...

To be continued...