Clover, Carl

カルル・クローバー

Carl is a young boy who, like Noel and Jin, attended the Military Academy as a student, but he dropped out without warning while Noel and Jin graduated. Currently, he is pursuing Ragna's bounty and the Azure Grimoire, which has led him to become a vigilante. He travels with a maid-like puppet named Nirvana, whom he believes to be his sister Ada. He refuses to accept that she is actually the Nox Nyctores Deus Machina: Nirvana, a causality weapon in the form of a marionette that amplifies its owner's desire to kill. After several people attempted to disassemble or remove Nirvana from him, Carl became extremely paranoid and possessive over his "sister."
In the end, it remains unknown whether Carl is insane or if Nirvana is truly Carl's sister, Ada.
Interestingly, one of the "Teach me Dr. Litchi" episodes reveals that Carl's glasses are what give him the ability to talk to Nirvana, as well as mailboxes and telephone booths. It seems that Valkenhayn has some history with Nirvana, as he is able to talk to and understand her just as Carl is. During a conversation, Nirvana tries to attack him, but he mentions that they "are not enemies anymore" and manages to persuade her to calm down.