Mika is a young man with a skinny build. He has mid-length tousled black hair which resembles the feathers of a crow. It appears dark green and sometimes even brown in certain lighting. His eyes have heterochromia iridium; his right eye is a light golden color, while his left is aqua.

He is not good at controlling his emotions; most of the time, they control him instead. As he is dependent on Shu, he has shown that he can also accomplish many tasks on his own but is afraid of failure.