We are specifically looking for black actors for this character! We'd like to keep it authentic as possible for we do not feel comfortable having non-black actors playing a black man.
For this role we are looking for a mid to low pitch. 

Kurumada is brusque and does not trust people easily. He tends to banter with others and occasionally refer to them dismissively. He is also shown to be laid-back and even a bit of a bully, teasing the others and referring to them with strange nicknames.

After having his torso pierced by Maple, his personality changed quite a bit. While he remained somewhat hot-headed and still prone to anger, however he also became more caring and notably more self-sacrificial.