[Izuku brightens when he sees the charm because that might do well enough to convince the little pixies to let them work on the structure without anymore curses. But he does feel a little bad about taking her cellphone charm like that. Maybe he can find her a new one? Or make one for her out of a crystal or two? Thoughts for later-! As he takes the charm in hand.]

That might work! I think I read in a book once that pixies like shiny and jingly things...

[In a book so who knows if this will work or not. Izuku just knows that his head is starting to ache and he has to sniffle again to keep the snot from escaping his nose.]

Ah- Ohhh- Okay. Pixies-san! [He's holding up the little charm to jingle!] If you can take off this curse...! We'll give this to you for your home! And we'll fix it too! Please!

[................ A silence stretches. And Izuku gives Ochako a nervous glance because maybe this isn't working- but then suddenly the angry hovering from outside calms down to a gentle hum.]

"Gimme gimme! Something shiny! We'll lift our curse! We'll give you a second chance but another misstep and we'll give you something worse!!"

[A twinkling noise is heard from the other side of the bard door and viola-! Izuku will suddenly inhale sharply and rub his nose free! The congestion is gone! The itchiness in his eyes is gone! And he doesn't feel like he's inhaled a ton of dust anymore!]

It worked...!!