Jiromaru is Ryo Takaba´s younger brother. He has long dark hair, he wears a pink shirt and gloves.

He tends to use the expression "desu" alot, when talking...He also calls his brother "anchan" which is a mix between "oniichan" and "aniki".

He calls his racing car "Jiromaru Special" which is a little similar to Ryo´s Tridagger X

He was born on the 25th of March and he enjoys cooking.

Jiromaru often has fights with Go Seiba and they mock each other alot.