Board Thread:Character Discussion/@comment-24018644-20150413153456/@comment-25375217-20150429172927

I think Ingrid could sense that Zelena had magic, but she didn't know who she was. So she cast the spell on her so that she didn't go up against her, no matter who she is.

Idk why Zelena would let herself get frozen, it's possible she just didn't know.

The second freezing, I believe, was Zelena alone. I think she reenacted the freezing spell on herself knowing Robin would leave with her, because Robin was about to leave her for Regina.