Finishing the chapter -
I see the universe is getting in the way of the yuri of it all.
Clearly the universe needs to be corrected.
I simultaneously feel like this guy is a known character, and that he's brand new to the story at this point, but a known character to at least Evie.
I could just be dumb (I am, no debate there) and am forgetting, but I expect(hope) that his "assistance" comes in the form of turning Evie into a Princely Type for the ball, so as to make it easier for her to be there with Elsa.
Also Princely Evie should be awesome to see.