Elliot is the step-brother​ of Gilbert Nightray and Vincent Nightray. Elliot is the only remaining son of the Nightray couples and is the heir to the Nightray family. Elliot is hotheaded, outspoken and always forces his opinions on everybody else. Ada, however, thinks he is a nice and dependable person deep down. He first meets Oz in the Latowidge library where they get into a fight over a character in the novel series "Holy Knight" (Elliot spoils the ending for Oz's favorite character, Edgar). He hated the Vessalius family. He also doesn't like Ada calling his name and despises how the Vessalius seem to get away with anything just because they were heroes 100 years ago. He seems to be greatly annoyed by Gilbert, but in reality cares about him. In recent chapters, however, Elliot's hatred towards Oz has dissipated, and the two of them have become good friends. ~!As a young child, Elliot was rather close to his elder brothers and sister. Being the youngest of the five Nightray children, he was often told to stay away from Vincent and Gilbert because the other Nightray children did not accept the two as their brothers. Elliot did not really know the reasons behind the hatred his older siblings felt for the other two, and so often he questioned why he was told to be careful around them. Elliot was the only Nightray child that seemed at ease with Vincent and Gilbert at a young age. When Gilbert Nightray made a contract with the chain Raven even though Elliot had not had a chance at obtaining the chain, he decided that he would provide for the Nightray family in his own way. As soon as Raven had made a contract with Gilbert, Elliot soon learned that his eldest brother, Fred had been killed by a head hunter known as the "Queen of Hearts". At which point, his elder brother Ernest and Claude told Elliot to hide away with their mother, and they would kill the head hunter. Both were killed by the head hunter as well, though Elliot and Vanessa were not killed. In recent chapters, it's shown that Reo made Elliot make a illegal contract with the chain Humpty Dumpty, in other words, the head hunter, to prevent him from death. Elliot killed his siblings Ernest, Claude and Vanessa because they wanted to harm Reo. But until recently, he wasn't aware of that he had a contract with the head hunter nor that he was the one who killed his own family members. !~ ~!It is revealed that Elliot is the contractor of the chain Humpty Dumpty. He didn't know it himself. He finds out during the hassle at Isla Yura's mansion. He later rejects the chain and destroys it, which leads to his own death. He's been officially stated dead in manga.!~