|Previous Occupation||Shinigami of the Gotei 13|
|Anime Debut||Episode 208|
|Japanese Voice||Kentarō Tone|
|English Voice||Benjamin Diskin|
He is a man of average height with short black hair and dark brown eyes. He wears the standard prisoners uniform in the Nest of Maggots: a white robe with a black sash and no shoes.
During his time in the Shin'ō Academy, Big Mouth would frequently boast that he would one day rule Seireitei, which is why the nickname 'Big Mouth' stuck to him.
Some time after his graduation Big Mouth supposedly resigned from the Gotei 13, but was in fact imprisoned in the Nest of Maggots for the danger he was deemed to pose.
When Hiyori accompanies Kisuke Urahara to the Nest of Maggots, Big Mouth recognizes her and pleas with her to help him be released. His pleas are interrupted by an attack by other prisoners which is thwarted by Urahara. At the end of the attack Big Mouth attempts to take Hiyori hostage to bargain for his release, however, Hiyori effortlessly defeats him and frees herself, leaving him severely bruised.