|June 4, 2095|
|Oso Academy (former)|
|Unnamed mother |
Unnamed father (deceased)
|0106 Return of the Lunatic Prince|
Okubo has long brown hair that's tied up in two pony-tails and brown eyes.
Because her biological father died with a huge amount of debt, her mother married another man, needing someone they could rely on to pay the debt. However, her stepfather keeps acting indecently toward her and Okubo has to swallow the insult because of the debts. Oryo takes advantage of this fact and seduces Okubo by offering her comfort.
- Okubo and Oryo were intimate before Oryo killed her.
- Her and her friend Kawarazaki's Hue matched very well together and would the Sibyl System have been able to rate them, it would have judged them suitable as couple.