Role: The introvert best friend who keeps secrets of their own

Age: Looks like a minor/teen, but the real age is unknown.

Specie: Half wolf, half spirit, a scientific experiment that has two different sides at a time.

Background: Ran away from a labrotory, everything is unknown before that. Has amnesia, can't remember their past before waking up in the lab. At the present, hiding among humans and acting like one.

Kuro's usual side, probably they were like this when they were a human. (And by the way, I somehow look like this drawing? Oh wow...)

Usually they calm down their emotions, don't have bursts often... But when it's all too much for them, their emotions burst out and... The eye colors started to change.

These pictures are the ones I found the appearance much closer to them so...

How do they look?