Board Thread:Questions and Answers/@comment-28633681-20160616161244/@comment-32069753-20161113174138

XxdogeloverxX wrote: It's Budo. If you don't believe me add Osana to the game and you'll see Budo ocasianly stalking her. I just did that, the closest that Budo even gets to Osana is that they're both in the same class. Budo never gets out of his way to stalk Osana.

Now that I think about it, Riku might be Osana's suitor, since YandereDev seems to be using a similar backstory than Kokona's for Osana...