I feel like mikayuu has a high chance of going cannon

Well Mika did say 'I love you' to Yuu. I hope it's cannon, I've been shipping them for years (づ￣ ³￣)づ

It’s also cannon that yuu is a homosexual

Oh yeah, it was in one of the specials ヾ(❀╹◡╹)ﾉ~

Can i ask which special?

It was in one of the episodes of Owaranai Seraph, but I'm not sure which episode. Sorry :( If you do decide find it, just remember that it looks something like Krul whispering a secret to Mika. Hope this helps ヾ(❀╹◡╹)ﾉ~

Oh okk thanks

You're welcome ヾ(❀╹◡╹)ﾉ~

Part two of the specials called Owaranai Seraph: Nagoya-hen (they replay clips from the episodes but with funny additions/bloopers)
Here's the clip from the scene:
https://youtu.be/tWLlwFfLOzE

He is??

Idk if it was a joke or not but I’m just taking it as a cannon

Well, I hope it was cannon lol. Even if it's not, at least we know the producers ship it ヾ(❀╹◡╹)ﾉ~