That depends. Are you or are you not the real Yumi?

[He didn't move or even loosen his grip a little, coldly glaring at the girl in front of him as he waited somewhat-patiently for the answer.

Well, only somewhat. Truthfully he's tempted to hurt her himself to keep her away from the others who knew her if it's the real Yumi, but...]

The real Yumi never, even once, had marks like yours on her. I doubt she can control a tattoo flickering like that.