Oumeno

Canon
'''WARNING! This section contains heavy spoilers for New Danganronpa V3.'''

Although this is a rather small ship within the fandom, the pair have a few moments in the canon game that could hint to them possibly getting into a relationship. (That is, if they had survived the killing game together.)

In chapter three, Himiko is grieving over the deaths of her friends, Angie Yonaga and Tenko Chabashira. However, she refuses to be open with her emotions and instead bottles them all in. This is when Kokichi can tell she is lying to herself, and calls her out on it. He tells her its bad to lie about your emotions and she should be true to herself. Because of this, Himiko allows herself to cry over her deceased friends and in later chapters of the game, thanks to Kokichi and Tenko's advice, Himiko is a stronger person and is more expressive with her emotions.

In chapter five's trial, Kokichi has passed away, but before he died he left Kaito Momota notes, telling him how to act around the rest of the characters. When pretending to be Kokichi, Kaito will refer to the notes and do what they say. He has to follow them very strictly so the other characters would think he was Kokichi. When taking to Himiko, Kaito (pretending to be Kokichi) tells her he loves her. That means Kokichi must have written in the notes that he loved Himiko, otherwise Kaito wouldn't have said it. Fans who dislike Oumeno have argued saying Kokichi could have been lying when he said he loved Himiko. While its never confirmed, it is extremely unlikely he was lying, this is because Kokichi knew he was going to die, and if he lied when writing the notes the characters would have realized it wasn't him, and he was trying to better himself and stop lying, so it is almost certain Kokichi had at least a crush on Himiko. Either way, it is up to fan interpretation, Whether it was a lie or not, Himiko responds by blushing deeply to Kokichi's confession, which suggests she may have had feelings for him too.