Twenty
(トゥエニー)
Twenty is the twentieth Artificial Intelligence program that Hitoshi created. However, despite the fact she worked, she teased him a little too much, and though the teasing was good-natured he couldn't handle it in addition to the pressures of school, so he stored her away.
Due to one of the highly frequent freak lightning accidents Twenty is also brought into the real world, where she too stays with Hitoshi just like Thirty (who calls Twenty onii-san - big sister).
Kimika Asoo
Kimika, the smartest and prettiest girl in school, plays a trick on Hitoshi by using his crush on her.
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