[Yui never wanted to have to fight. There's still part of her that's panicking and insisting this. But more than that, she doesn't want anyone to die.]

We need to stay alive. No one's going to die.

[Maybe if she keeps saying it, she'll start believing it. It's at least getting her to act.

She casts Boost on herself, then casts Psi on the creature.]

If there's anyone else with psy, maybe we can at least throw off its defenses!