Kenji has short blonde hair, and silver eyes. Wears white pants, dark shoes and a long, crimson red coat. Around his neck he wears a small pendant.
Mitsusada Kenji is a young, friendly and courteous man. He is friendly to most people and is in a good mood most of the time. He always tries to be gentle with people, and has no bad intentions with anyone. Although it has been shown that he can be a little confused from time to time.
Although Q4 is a rival to Team Caesar in the 1st and 2nd Cardfight!! Vanguard Nationals Tournaments, he and his team maintain a friendly relationship with them, wishing them "good luck" when they are found.
The national champion from two years ago, and the captain of Team Caesar. Kenji loves Roman history and models himself on Gaius Julius Caesar; it's for this reason that he's called "Koutei," the emperor of Team Caesar.
Humbled by Ren's Qualia during the first national, Koutei takes note of and arranges to meet with Team Q4. Caesar and Q4 form a powerful bond, working together in preparation for the second half of the tournament season.
Kenji makes his following appearance at the next national, pitted against Aichi Sendou. Ultimately Kenji loses the match, and retires to the sidelines.
In Season 2, Kenji and Team Caesar are invited to participate in the VF Circut alongside teams such as Team Q4 and Team New AL4. After losing in the Singapore stage to Team S.I.T. Genius Kenji is pitted against Ren Suzugamori in the Seoul stage. During the fight Kenji declares Final Turn and superior Crossrides Ultimate Dimensional Robo, Great Daiyusha and defeats Ren. However; the rest of Team Caeser loses thus allowing Team New AL4 to win the Seoul stage. Later on Kenji winds up at Shop Handsome looking for Aichi but ends up fighting and beat Gouki Daimonji. After the fight he announces that he will be attending SIT University and will not be participating in tournaments until he graduates. He is last seen on a plane bound for Singapore while donning the headband he inherited from Gouki after their fight.