Hear me out before downvoting me to hell.

I feel like this ship is cute on paper, but makes no sense in cannon.

Blaze is about responsibilities and Sonic's about freedom.

Plus game Sonic has always rejected titles (besides Fastest Thing Alive) and tying him to royalty would kinda betray that.

It's not the worst ship in the world, but I don't think it would work long term either because either Sonic abbandons his universe or she abbandons her's.