You know? If Sonic were to ever marry Twilight I can imagine he would Unironically not want to be part of royalty and everyone else would be cool with that so he's not referred as prince or even consort just "That Hedgehog Princess Twilight Sparkle is dating/married to"
He still helps her obviously but he's just in the sidelines when important diplomatic stuff happens giving support for his wife and she's happy with it.











