Alore, one example of the extraterrestrial creatures known as Darcromorpha, They are as the name implies dark rabbits. but they are also well known shape shifters. They may also have ties to black holes. These things are often powerful, some like this one that wear masks are ludicrous.
Some can even create and use black holes as projectiles, making them extremely dangerous.

Alore herself seems to be somewhat rogue, mostly acting as an assassin, a few have managed to tame her and use her to gain power and rip targets apart but all have died. Darcromorpha are able to enter bodies and use em as hosts as long as the person is alive, If the person's resistance is stronger than the will of the Darcromorpha they boost ones power, If the other way around, They become parasitic until the point of total loss of control.

As for the appearance of Alore's body, she was intrigued by cats as a spawn, and caused her to shift into this form as she likes looking like a cat more than a bunny.

Also as a small note, she acts very strange around Karen. Karen herself also seems slightly more aggressive when around Alore, She claims to not feel different at all.