The best crossovers are the ones that make canon make more sense! :D

(RE: which friend Combeferre Guides: ALL OF THEM? :D I don't know, I could see it with any of them. The obvious answer is Enjolras. And Sentinels are supposed to have some kind of mystical bond/protective/leadership instinct with their community which makes sense for Enjolras, but really it makes sense the same way for ANY OF THEM. Or ALL OF THEM.

...no wait, I know, it's Musichetta. :D)