Reltobert

 was part of a group of demons who were investigating ruins on behalf of the Elder Dragons. While part of a five-man patrol group, they fought the Crimson Vow in a tournament set of 1v1s.

Background
Unlike most demons, Reltobert is not a mage due to being weaker at magic. He is a fearsome combatant with the sword due to his strength far surpassing any human. He was Mavis von Austien's opponent in the tournament.

Relationships

 * Demon Patrol Group: Kohyal, Spiced Demon (name unknown), Chirel, Reltobert, Zawin
 * Demon Research Group: Helst, two unnamed researchers