Kotennyo appears in the movie Yu Yu Hakusho: The Golden Seal. She attended Spirit World Kindergarten and was the love interest of Koashura and Koenma.
Just as Koashura was going to give her a birthday present, Koenma abruptly jumps in and breaks it up, handing Kotennyo a bouquet before the two left a crying Koashura behind, who swore to get revenge against Koenma. It is hinted in the manga that Koenma may be in love with Ayame, but in the anime he shows no interest in her. This may be debatable because he is still in love with Kotennyo, however the movie itself is not canon to the series.