My split personalities and i Transmigrate into another world.

Dabi alderman is a 15-year-old boy who has developed Dissociative identity disorder due to childhood trauma under his adoptive parents. He can no longer remember what happened to him when he was younger. all he knows is that they are dead. join dabi as he tries to mend his broken self and tries to accept what he is.
the story starts as dabi and his classmates die in an accident but are all transmigrated to another world called 'Esserat' due to his only memento, a necklace saving them.
Dabi finds himself in the body of Micheal, a 15-year-old spotter for a thieves' guild team whose unique skill is [clone]. They sold Micheal out, and he is locked up in a maximum-security dungeon in the middle of nowhere where he dies.
Dabi, Ed, wiz, Em, and Jes fuse with Michael, resulting in the creating of a unique skill called [splinter]