Give her a moment here to grab a bandage - and a cloth, so she can first try to gently clean the wound just a little bit. Thankfully it's not very dirty to begin with, since Romeo's wound didn't quite show up in.. let's say any conventional way, so it doesn't take too long before she can just neatly apply the bandage to Romeo's hand, making sure to cover up the wound well.

".. there we go," Madoka says after a moment, once she's done applying it. "You're almost as good as new! Just make sure to be a little bit careful with that hand, okay..?"

A-And with your new power, too, bud? Please?