Doubt Doubt is the Servamp of Envy, recognizable by his long black coat and the paper bag he uses to hide his face. His Eve, Mikuni Alicein, calls him Jeje.
Not much is publicly known about his past beyond the fact that he's the third oldest among the Servamps. He spent a long time essentially alone until All of Love brought him into the Alicein household, where he kept to the cellar and mostly stayed out of sight. Mikuni's mother originally contracted with him and held the bond until Mikuni formed his own contract with Jeje, naming him in the process. Things took a dark turn when Mikuni used him to kill his mother—after which the two left the mansion together.
Jeje and Mikuni eventually ended up working with C3, where they partnered with Tsurugi Kamiya. The two seemed to develop a rapport, talking most nights. That arrangement didn't last permanently, though; Jeje and Mikuni eventually left C3 and went their separate ways professionally.
Personality-wise, Jeje is quiet and withdrawn. He rarely speaks, and when he does it's usually just mumbling. He's into a solitary hobby—building ships in bottles—and generally prefers his own company. He has a frustrating relationship with Mikuni when it comes to blood contracts; Mikuni constantly promises blood and then backs out, yet Jeje keeps falling for it, genuinely hoping each time that his Eve will come through.
Content compiled by AnimeList.moe from publicly available sources.
