Ako, also known simply as Earth Angel Mama (亜天使のママ), is the owner of Earth Angel.
Some time before the events of Yakuza 0 Ako had been appointed by Yuya to be the new leader of the Black Thunder gang after his departure from the group. She later left the gang and started a new life herself, transitioning to female and becoming the owner of Earth Angel.
Yakuza Kiwami 2
- Main article: Mama Under Attack
Kiryu goes to Earth Angel and sees Ako being abused by a customer, prompting Kiryu to defend her. When Kiryu returns to the bar Ako is a potential recruit for Majima Construction.
- Main article: Embracing My True Self
After Yuya is threatened by the Black Thunder gang, who demand money or a man named Okano, Yuya's girlfriend Miyu hesitantly tells Kiryu to ask the Mama at Earth Angel about where to find him. When Kiryu asks Ako who Okano is, Ako reveals she used to be Okano, and used to be the leader of the Black Thunder gang before transitioning. Later while Kiryu and Yuya fight Koji and his goons at Stardust, Ako shows up and throws Yuya his old Black Thunder jacket, re-energizing Yuya enough to help Kiryu defeat the rest of them.
Ako can be used as a member of Majima Construction:
|The Mama at Earth Angel and former member of Black Thunder.||R||Attack||Bat||Essence of Molotov||Spinning Lariat|
- Ako appears as a super-rare medical soldier card in Ryu ga Gotoku Ishin!.
||Fortune-teller • Hiro Chiba • Krazy Kyo • Mama-san • Masochistic Man • Marusa Marui • Media King • Miracle Johnson • Pleasure King• Tomomi Takada|
||Gakuta Takeshita • Jaguar • Koshimizu-kun • Li Leung • Mafia Boss • Namiya Meiden • Officer Kikuchi • Taka Uematsu • Takeshi Taira• Video Boy|
||Electronics King • Gambling King • Kasuga • Leisure King • Nugget • Papillon Kato • Sachiko • Spining • Tamotsu Nagaoka• Tsuneo Hirata|