Penance watches this with the sort of joyful fascination another might have if they suddenly discovered they could fly. She doesn't have to hurt people! Some of them can touch her! And they can still be human, not like Lucy, who she probably still couldn't touch outside of her dragon body.

She grins and laughs, looking abruptly like a little girl. It wouldn't out of place for her to start clapping her hands and jumping up and down at this point, but giggling and crouching will just have to do.