Mujika (or Musica) is a demon descent traveling in the forest outside the Grace Field House. She saved Emma and the other orphans of Grace Field House from the pursuing demons. She, together with Sonju believe in a religious principle to not eat humans.
Mujika has long, purple hair braided pigtails covering parts of her horns, and wears a mask with two holes positioned vertically. She has a pale complexion and wears a bluish-white cloak.