
However, the bullying and lack of communication experience also took a toll on Saiko-chan's personality. In the spin-off, Saiko's "evil" personality is completely omitted, allowing a glimpse of Saiko's "true" personality (a kind girl willing to sacrifice herself for her lover). She also cannot stand up for herself in moments of bullying. Saiko is a modest girl with low self-esteem and self-doubt, but also kind and loving.

It's a Saiko's original/main personality from birth.
He was taken into custody and sentenced to compulsory treatment in a psychiatric hospital and little Saiko-chan was placed under the care of Satsuki Omehara, her foster mother, who treat Saiko dismissively.

As a child, Saiko witnessed a massacre by her dad who stabbed a man to death in his home. She lived in a large mansion with her biological father. Saiko was born into a wealthy family and has loved everything connected with rabbits since she was a child.
