Illumi is most often expressionless. He has very long, jet black hair, with a piece of hair not put back, usually combed behind his head as well as large, black, pupil-less eyes. To disguise himself for missions or whatever use, Illumi uses large, round head pins to reconstruct his facial structure, musculature, and voice, beyond recognition. His spider tattoo has the number 11 on the spider's abdomen, but the tattoo location has yet to be revealed. He is 26 years old, 6' 1". 