Maid Mask

138

Maid Mask is one of the masks earlier seen in the story and the first mask crossed by Yuri which is considered stronger and more experienced than the masks she had encountered before.

The Great Angle

33

The Great Angel seems to have all the capabilities of normal Angels, except they seem to get stronger when he believes he's fighting "evil." He's even been said to have "unlimited power" by one of the Emotionless Masks.