#thank you so much for wanting to preserve his smile aaa knowing that he is so cared about makes him want to smile more indeed;; ;__;

[imagobin]

Head canons for illumi with a younger sister(A bit above the same age as Killua) that looks up in a way and likes being by his side since they were close before Killua came along please 😄

Awww cute idea! I'm always up for writing some good ol' Illumi being a good older brother lol he's so much fun to write! Thank you for requesting this, hope you enjoy! Sorry for taking so long aaa

📍Being Illumi's younger sister HCs📍

Growing up Together

Looking out for you:

You were born three years before Killua, so Illumi would've been 9 years old back then.

Kikyo was ecstatic about finally having a girl, and that happiness really rubbed off on Illumi too, who immediately felt like you were special for making mother so happy.

After that day he promised to himself he'd always protect you and look out for you, even when you thought you were alone, Illumi was most definitely keeping an eye on you to make sure you didn't get yourself into trouble. It wasn't in a creepy way or anything, you were a toddler, watching over you was pretty normal.

Since he was also still a kid and not totally swamped with work, he had a lot more time to play with you as well. Hide and seek was always his favorite, and he'd always praise you lots whenever you managed to find him or stay hidden for longer than usual.

Honestly he praised you a lot in general, especially for doing well during training once you'd turned 3, he's always been so proud of his little sister!

He would also give you little snacks or other gifts whenever you did good, though it wouldn't be anything too fancy, because once again, he was also still a kid, and didn't really have a lot of money to spend. But it's the thought that counts! And the reason why you have a shelf full of bugs preserved in resin that you never want to throw away (regardless if you do like bugs or not).

He'd also be the one to style your hair, for no particular reason aside from him enjoying that.

The first mission:

Even after Killua was born, Illumi's behavior towards you didn't change, you were still his precious sister, so of course he'd want to be the one assisting you in your first mission once you turned 5!

It was fairly straightforward, find the target, kill them and leave the scene without anyone noticing you were even there in the first place.

You'd been preparing for this, but still felt nervous, as it'd be the first time you'd be taking a life. Illumi felt for you, he'd been there as well, fear of failure was normal. "Just do it the way mom and I have shown you, if anything goes wrong, I'll intervene, okay?"

His calm tone and slight smile put you at ease, and you ended up carrying out the mission perfectly! You one-shotted your target with your favored method and nobody spotted you.

When you got back to him he looked so proud of you, glad that the family had another very skilled assassin in its ranks.

If you accidentally spilled any of your target's blood on yourself, he'll do his best to clean it up, and then, since you did so well, he decided to take you to a toy store so you could pick something for yourself.

You still treasure the toy he bought you that day dearly.

Still Close

Difficulties:

Over the years, Illumi ended up having less and less time to dedicate to you: he'd been appointed to train Killua along with your father, and he'd also started taking on more solo missions.

Despite how busy he is, he still finds time to check up on you. He always wants to know how your missions and training are going, what sort of progress you've been making etc.

He also offers you advice on how to increase your strength and speed, and if you can already use Nen he'll be even more serious about it, pushing you to create the perfect Hatsu for yourself. He's always happy to see how much you value his advice.

The only downside to being Illumi's sister is that he's become an 'all business' man. He hardly has time to just spend a day with you and have fun hanging out like you used to in the past, it always, ALWAYS has to do with the family's business, and you don't like that.

Illumi can see he's been growing distant from you, and even if he doesn't outwardly show it, it pains him, especially since he's aware that you look up to him.

He doesn't know how to approach things though, his assassin training didn't prepare him for this, and he's always taken his siblings' affection for granted, because you're family, but you don't seem as happy as you used to be anymore.

Confrontation:

The opportunity to fix things suddenly gets thrown his way after you two end up working together on a mission, after years of not getting the chance to.

This reminds him of your first mission, and suggests that he should buy you something this time around as well if you do everything perfectly.

You finally tell him that you don't need toys and prizes anymore, you just want to spend some quality time with him, without having to think about jobs or training or any of those things, you just want to spend time with your brother...

Illumi was not expecting this sudden honesty, not at all, but it was a good thing it happened, because he had no idea how he would've brought the truth out of you otherwise. "It's true that we haven't had that in a while..."

He promises you that if this mission goes flawlessly, you're going to have one of those days every two weeks, and through the whole assassination you can see that his senses are even sharper than usual, and so are yours, you both just really want to be close again.

Ever since that mission, Illumi has kept his promise religiously, although sometimes he slips up and starts talking about work, which he quickly backpedals from once you point it out.

Spending more time with him also means you two get to share your hobbies with each other as well, and that more often than not, you also get to listen to him talk about a certain weird magician he goes on missions with... though he refuses to tell you his name for some reason.

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[restinpeacesensei]