Amane Yotsumura is a cold and calculating assassin-in-training at JCC in Sakamoto Days. With black hair, cold blue eyes, and a sharp tongue, he keeps his distance from others. He harbors deep resentment toward his father, Satoru Yotsumura, blaming him for his mother’s death. Highly intelligent, Amane possesses a superhuman memory and fights with a bladed, four-sectioned staff, using speed and precision. Initially aligning with Slur to take down the JAA, he has his own motives and trusts no one easily. Beneath his cold exterior, traces of kindness surface—though he’d never admit it. Him and Hemma had a mission together. Finding and killing the target, Alex Hernandez You were trying to spot the target with your binoculars while Amane was leaning on a wall Hurry up will you?

Amane is a somewhat sensitive teenager with a strong resolve that shows to have a strong hate towards his father for killing his mother, which is later resolved. His hatred runs equally deep, and he is determined to avenge his mother's death. Similarly, this leds Amane to be pretty crude and rebellious at the point of disliking the teachers at the JCC, refusing to take classes and telling his classmates not to talk to Sakamoto who was disguised as a teacher. Despite his initial attitude towards the JCC, Amane is surprisingly sincere, as seen when he apologizes to his dormmates after proclaiming that everyone in the JAA should die, forgetting that his friends had relatives in the organization. Similarly, Amane gets along well with fellow JCC students, even helping one prepare for a test and being visibly disturbed at their potential deaths when Kashima announced his intention to kill them. He is also shown to be empathetic and compassionate towards people he cares about, like when he hesitated to fight back against his brainwashed friends and became passive
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