[A flash literally and figuratively! Gokudera has dealt with pixies before, back when he hadn't practiced with his magic enough.

At the compliment, he moves to look at the trapped swam and clicks his tongue at the angry squeaks.]

I'll give you all candies if you promise not to attack. Look, we'll even do what we can to make up for what happened, okay?

[And he carefully lifts up some of the net-like barrier to let the pixies free.]

Sorry for the net... [Here's hoping they won't curse him just for trying to step in to help Midoriya.]