Did teslid fuse with the demon lord, I remember a spoiler describing that teslid is indeed...

probably shouldve marked that even if you're not certain lol

















the actual answer is a lot bigger tho

My bad

SPOILERRR



















I saw a lot of comments and some people also told me that the Demon Lord and Tesilid are the same person. The Demon Lord is Tesilid if he turns completely corrupted

and once again





















it's much MUCH more complicated than that lol

Please spill the beans

Spoiler theory









I theorized a while back that this Thesilid is the same as the being that was trapped in that dungeon where Aillette got that save disk. The unknown being that was trying to figure out who she was and was later crushed to death.
Which explains the sudden loss of language abilities because he’d been trapped for SO long and a fear of the dark.