#Cass saw this little blob girl and said :you're mine now:

[bet-on-me-13]

Symbiote Ellie Phantom AU

After she was saved from Destabilization, Ellie gained a nifty new power. She can Melt on command and move around freely, which is just a really fun power, even if she is a bit weaker when she uses it .

But one day, she gets really badly hurt. Like, Really Hurt. Let's say the GIW got a lucky shot and managed to capture her, and experimented on her for a week before she managed to escape.

She can't keep her Human Form stable anymore, but her Goop Form is good enough for now. All she needs to do is find an Ectoplasm Rich Environment and try to heal up the best she can. Hopefully Danny will find her after she misses her monthly Visit.

She ends up in Gotham while searching for a place to heal, but the GIW is hot on her tail.

She needs a place to hide, and the only way she can think of is to overshadow somebody and pretend to be them while the GIW passes her by.

So she jumps into the nearest person she can find, a girl close to her age jumping across Rooftops.

But since she was in her weaker Goop Form, she can't enter a person without their permission. So she slides up to the person in Goop Form, jumps on her Back, and telepathically asks her for help, begging for permission to hide in her for a bit.

The girl she tried to overshadow was Cassandra Cain.

After some begging, Cass agrees and Ellie sinks into her. Again, she can't fully Overshadow her, so she's basically a passenger until Cass decides to give her some control.

The GIW passes by them, and Ellie tries to leave Cass only to realize that she can't. Since Cass was exposed to the Lazarus Pits, she is has a weird Biology, and since Ellie already had a Wierd Biology being a Halfa Clone as a Pile of Goop, they somehow can't leave eachother.

Cass gets a new Roommate, but instead of sharing an apartment, its her body. It's honestly not that bad, Ellie can give her some of her old powers and she can still communicate by making a Goop Head come out of Cass's shoulder.

They get along really well too, Ellie can ways be there for Cass whenever she needs somebody to talk to, and Cass is the Supportive Older Sister who helps Ellie talk about her feelings.

The Bat Fam also doesn't know. They figure that this will probably be fixed soon enough, so there's no real reason to tell her Family. They do find out after a few weeks however.

Cass accidently uses Ellie's powers in front of one of her brothers, which causes them to tell Bat's which means the entire family knows by the end of the day.

Cass has to explain the situation and introduces her new little sister. "This is Ellie. She's a Meta who escapes a secret Government Organization and asked for my help to hide from them by hiding in my Body. Unfortunately, we can't split up because her powers reacted strangely to the Lazarus in my blood. She is now my sister. You are not going to make her leave, I will not let you."

It takes a while, but the Bat Fam ends up accepting her. They do end up looking into that "Secret Government Organization" though, and find that they have been experiencing Raids by an army of Ghosts for the last few weeks.

"Oh right, I missed my monthly visit to my brother." Says Ellie from Cass's shoulder. "He must be looking for me, no biggie."

It's definitely a Biggie.