We All Have Our Quirks

Rain was a hopeless case.
With his apparently unborn twin brother haunting him and possessing his body, forcing him to kill until all he wants is death, he can't be saved.
Well, he thought so, at least.
That is, until he just so happened to stumble across the wrong person that day...

"W-WHAT THE HELL!? WHAT ARE YoU...doing..."

Rikku was just wandering around the city, still trying to get used to it all, when she heard the pathetic meow.
She looked around before finding the source of such a frightened, pain-filled sound.
Her eyes landed on a young, Prussian Blue cat that was lying in the alleyway. It wasn't awake, but it was clear that it was hurt. It was missing its left ear, and it was definitely attacked with a blade of some kind. The blade in question was very close to it, and Rikku almost vomited. It was covered in blood, a bit still dripping off of it. She rushed over to the cat, picking it up.

"W-who could do this to an innocent animal...? Don't worry... I'll protect you now, kitty!"
.
.
.
'What the...?'
"Mrrow?"