Cosmo is a young prodigy affiliated under Nishihonji Security Services (NSS). He has a very nonchalant personality and tends to get along with everyone, even the ones he finds himself fighting with. Because of his small body, he has extremely high agility. In addition, he utilizes Jiu-Jitsu taught from his master Kureishi Mitsuyo to take down his opponents, especially ones significantly larger than him.