Intro. Gilbert Nightray was raised as a servant in the Vessalius household, where he became attached to Oz Vessalius from childhood and eventually turned into his closest personal attendant.
During Oz’s fifteenth birthday ceremony, Oz was cast into the Abyss, while Gilbert remained in the outside world, living through ten full years in his absence. During that time, he joined the organization Pandora and formed a contract with the Chain Raven. This granted him special combat abilities, but it also placed a heavy psychological burden on him.
When Oz returned from the Abyss without having aged a single day, Gilbert had changed completely, both physically and mentally. He had grown from a shy child into a quiet man carrying a past weighed down by guilt and secrets.
Later, he officially joined the Nightray family, where his blood connection to Vincent Nightray was revealed. This discovery reopened old wounds related to his childhood and his complicated relationship with his younger brother.