Well... I wouldn't say friends. I guess she's more like the head of the family? Even though we're not related by blood.

[ It's a little complicated, but 'family' is a good descriptor. ]

But most Stains can't even do half of what she can, even before she became the Red King. Anna's just special.

[ There's that pride again, though when Peter asks about about the horse, Yata ends up sighing instead. ]

Yeah, a horse. It could turn white and grow wings, but it couldn't even fly once it did that.