Also with Sebastian's cinematic records, we see that he makes a contract with Ciel, kills everyone in the sacrificial hall and the burns the manor. Here's one of the most solid evidence of the Two Ciel's Theory in my opinion.
The last request for Sebastian to never lie.
Right after demanding that Sebastian will never lie, Ciel announces that he will take revenge, as Ciel Phantomhive. Sebastian then starts chuckling, calling our Ciel to be quite the liar, he is laughing at how Ciel contradicts himself. From this we can take that Ciel is actually not who he seems. There is further evidence in the next few pages.
From his words, we can assume that Ciel is the one who was constantly regarded as this child from Kelvin's Memories because they both didn't go out often and that just being out with his family is considered to be a rare occasion. If this Ciel was the shy one from previous chapters, that would make him not Ciel, but actually someone taking on his name.
If Ciel is really not Ciel but someone taking his identity, Sebastian would be lying every time he called him so, and that would go against the final request that came with the contract so basically he can never call Ciel by his name and- wait. Have you guys ever heard Sebastian calling him Ciel? Sebastian has never called Ciel by his name. It has always been aliases or titles like Smile, young master, and even mistress at one point. This is evidence pointing out that Ciel is... Not Ciel.
YOU ARE READING
Two Ciels Theory - Black Butler Conspiracy
FanfictionTwo Ciel's Theory - A Confirmed Black Butler Kuroshitsuji Conspiracy. ・⎯♔✦♚✧♞★ 𝕬𝖑𝖑 𝕳𝖆𝖎𝖑 𝕿𝖍𝖊 𝕿𝖜𝖔 𝕮𝖎𝖊𝖑𝖘 𝕿𝖍𝖊𝖔𝖗𝖞 ★♞✧♚✦♔⎯・ It is a Kuroshitsuji Conspiracy, it is also called the Double-Ciel theory. This theory states that there ar...