The guild master of Cait Shelter, the creator of Nirvana, and the leader of the Nirvit people.
He is the only survivor of the Nirvit people and has stayed in isolation until Mystogan brings Wendy to him. As Wendy wakes up, Roubaul creates a guild called Caitshelter for Wendy. Until episode 68, Roubaul explains his people's past and how he created a guild out of illusions for Wendy. Roubaul's past is haunted by Nirvana's consequence when darkness counteract the light. When the people of Nirvit attempts to create an era of peace by removing the darkness, the darkness returns to restore balance by corrupting the Nirvit people. Now with Nirvana destroyed, Roubaul can finally rest in peace because Roubaul explains to Wendy that she has a real family in her new found comrades, Erza Scarlet, Natsu Dragonil, Lucy Heartphilia, Gray Fullbuster, Happy, and the rest of the mages: Lamia Scale and Blue Pegasus.