The character is a 2/2 white Cat creature token.

Huh... cats are white-haired...
The background... is it what is Innistrad will be?

From the thumbnail I though Orin had let her hair down.

No cat tokens in Innistrad...maybe Ravnica?

On the pivix account of the artist, he says it's art for a Cat Warrior creature token. If the artist says that what his art is, then that's what it is.

And especially when the artist titles it Cat Warrior. Just click on the source link of where the image came from and it tells you what it is. That's what the source link is for.