|Title||First Generation leader of the Red Scorpion|
|Likes||Way of life, her son|
|Relatives||Takeshi Kongou (lover)|
Rai Kodama (son)
|Fighting Style||Scorpion Killing Technique|
|Manga Debut||Chapter 22|
Aiko Tsukishima (月島 愛子, Tsukishima Aiko) was the 1st the generation leader of the all-female motorcycle gang 'Red Scorpio' and was Takeshi's lover and the mother of Rai. She died of giving birth to Rai and theher death shock of Takeshi leaving her.
She has the appearance of a young and beautiful woman with dark medium hairs. She usually wears a gang leader outfit.
Despite being a gang leader, she was shown to be a kind and caring woman who follows her own way of life. She seems to trust Haruka to the point of allowing her to take care of Rai after her death. She never blamed Takeshi for leaving her because she believes everyone has their way of life.
Aiko was the founder of the all-female motorcycle gang "Red Scorpio" and was the one who took care of Haruka and treated her as a sister. She later met a guy by the name of Takeshi and fell in love with him. When Aiko was pregnant with Rai, Takeshi left for unknown reasons, possibly leaving to prepare for the 23 District Project. Aiko told Haruka to take care of Rai as a mother and never blame Takeshi because he had his own way of life. Later she passed away from the shock of giving birth Rai.
- Crazy Machine Gun (苦雰ジー魔神狼 [クレイジーマシンガン], Kureijī Mashingan; lit. Anguished Fog G-Devil Wolf)