Hmmm… okay, I’ll start with the thing I’m most certain about!
- After all, I think only him could put that muzzle on Sebastian…
Yes, yes and yes!! I, too, think it was RC who muzzled Sebastian and a lot of Japanese fans see it the same way. It’s very unlikely that the attackers did it because simply - why go out of their way to muzzle the dog and lock him up in a room when they kill him anyway? Also, Sebastian is supposed to be a watchdog, so he certainly wouldn’t let strangers put a muzzle on him so easily. Also, as I mentioned in this post, a lot of people in the JP fandom doubted that RC was sleeping in ch133, so at least timeline-wise it wouldn’t be impossible for RC to muzzle Sebastian while OC was taking a nap - i.e. before the whole massacre started.
As to why RC would do it, I still suspect that he was somehow involved in the attack or at least knew something would occur. In this chapter as well as in the last chapter, OC was constantly shown with “sweat drops”, indicating that he was scared and nervous, whereas RC didn’t seem as nervous as OC.
RC looks concerned, but I rather got the impression that his concerns were more like “This isn’t how we planned it. Did something go wrong?” rather than “What the hell is happening????”. What I mean is that he doesn’t look completely clueless like OC.
Especially the panel above makes me believe that he did have a clue what was happening outside the room.
Just for the record, I don’t think he killed his parents, his dog and all the servants (like I mentioned in another ask, I think the culprits were supernatural beings), but I do low-key believe he had something to do with the attack and thus was the one who 1) muzzled Sebastian and 2) took off the ring from Vincent’s finger.
And now to the other question which I’m honestly not sure about…
- Do you think the way Yana drew Tanaka being stabbed in chapter 134 and Agni being stabbed in chapter 127 could be a hint that the same person killed both?
Mmmm, yes/no! xD I think it’s possible and actually very likely that the ‘knife guy’ (probably Lord Polaris) who killed Agni was one of the culprits who murdered the people in the Phantomhive manor on that day. The way he killed the servants so brutally and mercilessly, with all the bloodstains everywhere, reminds me of the way Agni was killed in ch127. Also, if they were indeed the same person, that would perfectly connect Blavat’s Blue Sect with the main plot, so I think it’d make sense in terms of ‘plot advancement’, too.
However, I’m not really sure if he was also the one who stabbed Tanaka :( If they were the same person, why did the ‘knife guy’ not manage to kill off Tanaka? Why didn’t he stab him multiple times in the back just like he did to Agni? Why did he let Tanaka survive?
And another reason why I have doubts is Tanaka’s behaviour.
He was clearly facing the attacker, yet he said to OC in ch62 that he didn’t see anyone. Why would he need to lie? Why can’t he just tell OC what the ‘knife guy’ looked like?
Also, considering Tanaka’s words in this month’s chapter
“Do not come here! Lord Ciel (is)… this is too awful *for you*!”
I still suspect that the attacker Tanaka was facing was someone he and OC knew well and that Tanaka didn’t want OC to know the truth (i.e. the identity of the attacker) since it’d be too cruel for OC in particular. I’m not necessarily saying it was RC who stabbed Tanaka (I have doubts), but I think it’s at least someone whom we readers already know and that’s why I rather doubt it was the ‘knife guy’ (uness the ‘knife guy’ is someone we know - but then, if it was John Brown, for example, I wonder why 1. Brown didn’t manage to kill off Tanaka and 2. why Tanaka said “this is too awful for you” to OC? D:).