Azuza is a fourth year student at the Continental Women's College as well as an intern at a bank. She hired Hamatora to protect her because she had learnt the code of the Toyasaki household's safe and now both kidnappers and thieves of the same group were after her who were trying to attain that code.
As an intern at a bank, Azuza developed a strange habit of writing any numbers she heard right away. It was then she met and started a relationship with Shinji Toyasaki's late father. One night while sleeping naked in bed with the patriarch after having sex with him, she woke up to hear the former head talking in his sleep; uttering the code to his modified safe which was 2A5678BX. Due to her odd habit, she got up and started writing down the code on a notebook nearby the bed.