Kobayashi

Kobayashi, nicknamed Koby, is Darien's friend from college, along with Saori, whom Koby is secretly in love with.

In Sailor Moon Super S Episode 5, Perfect Couple, when Rini discovered that Saori was in love with Darien, she feared that they would get married, causing him to break up with Serena and prevent Rini from being born, so she told Koby to tell Saori that he loved her. Eventually, Saori realized that Darien was in love with Sailor Moon, so she gave up on him and fell in love with Koby instead.