User blog comment:Genista882/Why I think the writers made 02 sterile./@comment-26567684-20190502122542

First of all, I live the MitsuKoko pic!

Secondly, I came to believe 02 was infertile because, as with all half-bread creatures in real life, she is a Klaxo-human hybrid. As for her “I’ll teach you what comes after a kiss in episode 12” and her knowledge of intimacy, I doubted she had been intimate with someone else due to her love for Hiro. My suspicion is either she did heavy research on it or she was sexually abused.