recruitment into MAT, maintaining his employment during weekends. After the death of Ken and Aki Sakata, the workshop was disbanded. : The 28-years-old founder of the workshop and its main employer. Ken was originally a racer five years prior to the series but was forced to retire as a result of an accident that injured his left leg. Although he became an engineer after that, Ken's talents were recognized by MAT members as he also lent a hand in improving their vehicles. As revealed in episode 6, Ken and his mother were survivors of an air raid back in his childhood (3 years old). He was killed by the Alien Nackle alongside Aki as part of their plan in weakening Go's spirit. He was portrayed by . : The 18-years-old elder sister and Go's girlfriend, working at a clothing store. Alongside Ken, she was killed by Alien Nackle. The Superior 8 Ultraman Brothers revealed that an alternate universe counterpart of Aki was married to Go and had a daughter named Megu. She is portrayed by . Aki's death by Alien Nackle was written due to her actress had a scheduling conflict with another television series at that point of time. : The youngest brother of the siblings, aged 11-years-old. Jirō looked up to Go as an older brother figure and aspired to join MAT in the future. After losing his older siblings to Alien Nackle, Jirō lived with Rumiko and discovered Go's relation to Jack in the final episode. As Jack was forced to return to the Land of Light, Jirō recited the 5 Ultra Oaths as a token of his respect. Jirō made a returning appearance in episode 10 of Ultraman Ace and as revealed in Ultraman Mebius to have share the 5 Ultra Oaths to Kazuya Serizawa. He is portrayed by . Minor characters : The daughter of a painter named Takeshi, Shizuka was the subject of his paintings back in her childhood. After she suffered from waist paralysis as a result of a vehicular accident, the family pair moved to the Mt. Shirakami where Takeshi helped his daughter in walking again until his death. Shizuka lived there for the rest of her life until the mountain becomes a battlefield between MAT members and the monster Shugaron. She was killed when trying to save her father's painting as Go and the MAT members buried her next to Takeshi's