Hyan Choy

Her transformation: She starts as a timid, naive, and nervous C-rank Tanker who is heavily reliant on her boyfriend. The trauma of betrayal and immortality: After being betrayed and abandoned in a dungeon, she discovers a cursed ring that grants her endless regeneration, forcing her to be killed and reborn repeatedly for an unknown amount of time. Her resulting personality change: This trauma causes her to become stronger, colder, and even "psycho" (as described in a review), and she is now driven by a desire for revenge