Dhabi

Dabi is a thin young man with spiky black hair, though his natural color is red. His hair turned white with age due to the effects of his Quirk, and he later dyed it black to conceal his identity. His most distinctive feature is that large areas of his skin are an unnatural purple hue and are creased, resembling burnt flesh. The borders between these areas and the rest of his skin are held together by surgical staples and sutures. Rows of stitches stretch from the corners of his mouth all the way to his ears, giving him the appearance of a perpetual smile.
He wears black pants and a black coat over a light-colored shirt, as well as black boots and a belt.
In Chapter 290, he washes out the hair dye and goes back to being white.
Starting with the final arc, he wears a white kimono, white pants, and boots. He also wears a brown belt over his kimono (in the anime, the belt is white).
Personality
Judging by how rudely Dabi refused to tell Tomura his real name when they first met, his manners leave much to be desired.
Overall, he's quite cool and confident in himself and his actions. He rarely expresses any emotion. He respects Stain and is a supporter of his ideology. He even calls himself the one who will implement his plans.
He displays emotions only when interacting with family members.