That’s probably true of all the ROs, lol. Same with being persistent.
Me either. My first vibe from them on the bus was that they’re the type to boil your rabbit if they see you flirt with Seven.
With Seb, it feels to me that they are a RO, but it’s that “you make a connection because of Maya” kind of thing, where Maya is the thing you have in common and that brings you together.
And G… I think I would’ve agreed with you before, but their POVs in the stuff on Patreon convinced me that G won’t be a one-sided thing, unless the MC plays it wrong. G seems to already feel a… connection, I guess? It’s like they see something in the MC that speaks to them, and it may be that the MC reminds them of who they once were, before fame left them jaded. Plus, I think G is kind of lost right now. I don’t think their romance, or the poly, is so much about fixing them but about reminding them that they don’t have to be the image they portray or what people want them to be. That may be getting too deep, but G is getting to me (so is Vic, really).
I agree that Blake feels more like a RO than Seven (my pillow feels like more of a RO than Seven right now!). Not so much where Seb is concerned, but I get what you’re saying. I think Seb’s obvious submissiveness and shyness, combined with their focus being 100% on Maya, makes them feel less like a RO than they are. Although, with Blake, it feels like that would just be a hate-fuck path, which may be the intent since they aren’t a real RO, anyway.
I agree with this, mostly. I think G’s may be one that won’t require either of those. Even if the MC romances G alone, I think it may be possible to do it without going in trying to be a homewrecker, because the MC might view G and V as being ill-suited for each other.
Of course, my husband is just going in with a wrecking ball to them for one of his MCs (he wanted to romance both Gina and Victoria, but wants to bang Blake–I told him that’d lock him out of G, from what I can tell from tumblr, so he’s going to destroy G/V’s marriage, lol. His other MC is torn between a full poly with them and going for Orion.
Yeah, I have that same problem with my MC (well, MCs, since I have two now). August seems perfect, but they aren’t a guy, so… 
I’m thinking I may let one of them be bi and do a G/V poly just to see how it goes, with Griffin being the catalyst for her going for the poly. V really does seem like a sweetheart, and it’ll be a new experience for me, since I only play straight females. I may get squicked if there are sex scenes with MC/V and have to backtrack, but we’ll see.
I’m also guessing Dakota is nothing but bad news based on that ask today. Good thing neither of my MCs will hook up with him.