|Affiliation||Gotei 13, Soul Society|
|Position||3rd Seat of the 11th Division|
|Base of Operations||11th Division HQ, Seireitei, Soul Society|
Ikkaku is a tall and musclular man. He is bald, a fact made fun of by many people, especially 11th Division Lieutenant Yachiru Kusajishi, who calls him "cue ball", "chrome dome", or "pachinko-head" (as a result of her fondness for giving people nicknames or when he questions her direction skills). Ikkaku's bald scalp is very reflective while under the sun, causing the members of the 8th and 11th Divisions to mistake it for a full moon at one point, much to his chagrin. His eyes each have a small red marking at the outer corner. Ikkaku has a scar, which he gained while fighting Ichigo Kurosaki during the Ryoka Invasion, running down the left side of his chest. He wears the standard Shinigami robes, with the exception of no tabi with his sandals. Seventeen months after Aizen's defeat, Ikkaku sports a gold-plated shoulder plate on his right arm with the kanji for dragon (龍) printed on it.
Like most members of his division, Ikkaku is violent, fight-loving, and rude, which has been noted by Tetsuzaemon Iba, among others. He loves fighting so much, he is unwilling to travel anywhere without a sword, resorting to carrying a wooden one when posing as a student at Karakura High School. Ikkaku is very self-conscious about his baldness, often insisting he is not bald and his head is "shaven", and will threaten anyone who points this out.
Ikkaku considers fighting fun, and tries to get as much fun as he can, even taking deadly risks to drag out fights for as long as possible. He limits his skills in order to make fights last longer, using his Bankai, or even his Shikai, as a last resort against his opponents. Ikkaku constantly smiles when engaging in a fight with a formidable opponent.
Ikkaku considers the only honorable battles to be those fought one-on-one. Even the threat of death is not a reason to ignore this fact, for he believes the winner is only determined when the other dies. In his fight with the Arrancar Choe Neng Poww, Ikkaku was losing badly, yet refused to surrender.
Ikkaku has a sense of loyalty and responsibility, and is fiercely loyal to his captain, under whose command he wishes to die. He considers surviving an otherwise lost battle good luck, which his captain taught him, and carries a blood-clotting ointment in the hilt of his Zanpakutō.