Pia Undo

Pia Undo is a character exclusive to the Madoka Magica crossover with the Japanese mobile game Divine Gate. She is the Madoka universe version of Divine Gate's original character "Wind Pier". Pia is a pathologically shy girl who, as Wind Pier, wore a mask to hide her face out of anxiety, and carried around a canister of oxygen for whenever she suffered from panic attacks. Her anxiety and panic attacks seem to carry over in the Madoka universe; in her magical girl form, she wears a mask on her head, reflecting the mask that Wind Pier wears.