I've been reading your 2CT theories, and damn I'm super into it now lolol, In chap 99.5 (That Butler, Nursing), Vincent starts talking abt fags to Ciel, then all of a sudden Ciel says " I don't need fake brothers". Wogh reading over it now that sort of sends a chill down my spine. Do you think that was Real!ciel referring to our!ciel and somehow in someway they both actually despised each other?? Boi I am not good with all these theories lolol but ya pls explain that specific panel to me!! :3
Mmm! Assuming that 2CT is true and the Phantomhives had twins, I really do not think that the twins hated each other :/ It’s not just my wishful thinking, but the twins hating each other simply wouldn’t make sense to me, because
our!Ciel clearly suffers from survivor’s guilt.
He thinks he wasn’t worth protecting and it should have been real!Ciel who survived rather than him. There’s the possibility that our!Ciel had a kind of inferiority complex towards his brother, but he really doesn’t seem like he held a grudge against him. At least, imo there’s no scene so far that hints at it :/
I mean, if our!Ciel despised his brother, then he wouldn’t look this happy to go on a boat trip with him and his parents, don’t you think? D:
2) this scene from our!Ciel’s flashback (ch90)
In this scene, real!Ciel says that he will definitely protect our!Ciel. Unless i.) this memory of our!Ciel is altered for some reason or ii.) real!Ciel is one hell of an actor, I think we can safely say that real!Ciel was very protective of our!Ciel. I don’t see any negative emotions such as hatred in his eyes and also, judging from our!Ciel’s monologue “I still had you” it seems our!Ciel trusted him and was comforted by his existence :/ (Here’s a detailed analysis of this flashback with some linguistical explanations that might be helpful!).
So, if 2CT is true, imo it is more likely that the twins got along well, at least on our!Ciel’s part (we don’t know real!Ciel’s true personality yet since we never had a monologue from his POV).
Now coming back to your question what real!Ciel might have meant in this scene…
based on the assumption that our!Ciel didn’t hate his brother and the twins got along well more or less, I and a lot of other Japanese fans interepreted this line as following:
“I don’t need fake brothers (because I already have a real, one and only brother.)”
We rather saw it as a possible sign of real!Ciel having some kind of severe “brother complex” (just like Edward has a “sister complex”, but the difference being that real!Ciel kinda has those yandere (psychotic) vibes while Edward doesn’t). And now that there’s a high chance that real!Ciel came back to life and is the gunman who shot Soma, it’s becoming more and more likely that he wasn’t just a cheerful, innocent child, but also had a dark and maybe cruel side :/