the ml exorcist is not the teacher reincarnated right? pls pls noo it would be weird

i had that doubt too but now im betting its the teachers friend bc they both kinda look alike no?

read at your own risk this is such a big spoiler i checked the novel spoilers..
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jaegyeom is not reincarnated
his teacher is still alive (but as a corrupted spirit) and he is actually hiding in plain sight (and the letter in the last chapter of this manhwa is connected to that and why he cursed mc with immortality)