Zelda narrows her eyes at the groaning, but she lets it go. Tina is nothing else if not unique, and Zelda has grown to at least tolerate it. At least, that's what she would say, even if it's perhaps a bit more than tolerant.

She won't admit she likes any mortal. It's nothing personal.

"I have no desire to harm you, so perhaps that should be reason for trust enough." She leans in slightly, offering Tina a thin smile. "I do not intend to let any harm come to you. I don't care much for mortals but as long as you're in my charge, you are my responsibility, and you have nothing to fear from my world."

Anything else is up for debate. But mortals should not be dragged into witch business.