She developed schizophrenia at a young age, which manifested itself as her Devilmen form, which had distinctively male personality traits. She had a long standing history with Jun Fudo, made difficult due to her love for her and constantly shifting personality. Aoi's Devilman factor was unique in that she unconsciously allowed her shifting personalities to change her anatomy with most of her body acting masculine save for her face and chest but could even grow a penis out of her groin area.