Maji bears the basic character design of characters by Leiji Matsumoto, a short and mostly ovaloid body. He has black hair as well as a goatee. He is always dressed in a yellow shirt (sometimes it features a white jolly roger), brown pants, black gloves, and a purple bandanna with a jolly roger.
Maji much like the rest of the Arcadia crew is often seen doing his own personal business until the time to act is upon them. He is known for his gentle demeanor, especially with children that he takes care of. Maji is a bit of drinker and often shares drinks with Dr. Zero.
As chief mechanic, Maji knows how the Arcadia functions and goes to areas that need to be fixed, often accompanied by Yattaran. He is also in charge of the main artillery, using the turrets to take out most obstacles heading towards the Arcadia.