Reika meets Gin during a snow storm as they are travelling through their hometown. She's friendly to them because her father was one of the dogs who faught against Akakabuto. She brings them to a shed where they take shelter in the storm. Rocket is sent to spy and find the leader of Ou. He runs into Reika who is on her way to bring Gin, John and Akame food. She lies to Rocket telling him she did not see a brindle akita. Hougen's men take Reika as a hostage and as a prize for Hougen. They then surround the three Ou leaders. Akame escapes to go to Ou for help and to see Weed. Hougen says they will kill Reika if Gin and John attack. They give in to save Reika and get beaten up badly. John and Gin get taken to a shed in Hougen's territory where they are held hostage and tortured.

Hougen is very interested and Reika but she ignores him. He calls her his girl and even hunts for her. When Hougen brings her a fawn, she escapes and Hiro shows up trying to defend her. Hougen manages to get ahold of Reika by jumping over Hiro. Hiro is beaten and dragged away to where John and Gin are being kept. Hougen threatend to kill Reika if he were to attack back. Reika escapes with John, Hiro, Lefty, Roshi and Tomi. She and Hiro head west and split up with John's group. She is so upset tht the leaders of Ou are risking their life to save someone like her. Reika holds a lot of guilt on her shoulders especially after John gets killed by Hougen.

After the dogs bury John and the other three that fought alongside John, Reika goes with Hook through the Northern Alps so they can bury one of John's fangs in Ou.

In the manga Reika settles down with Hiro and they have four pups. The male named Kin (only one named bpup with specified gender) and other unnamed pups are golden, one is brown like Reika and one is golden with brown ears like Hiro.