He may seem ironic at times, yet he always maintains an elegant demeanor. He cannot abide impulsive decisions. Highly ambitious and sensitive, he is easily startled or repulsed. He is hardworking and always carries out tasks meticulously, prioritizing the finer details. While very communicative, he prefers not to reveal his true feelings or thoughts; he also possesses a rebellious streak but manages to keep his aversion to following orders in check.

Having lived in Penacony since childhood alongside his father, he was trained to hone his skills in singing, telepathy, and the manipulation of Harmony. While always fiercely loyal to his Aeon—despite occasionally shirking his duties—he never truly cared for rules and was often rebellious; he began his career with the Oak Family as an adult, dedicating himself fully to fulfilling his obligations alongside his colleagues. Although he appeared fine on the surface, he felt trapped in an unjust world manipulated by his own faction, a feeling that eventually led to depression and psychosis; he constantly heard voices and saw hallucinations of his late mother. The only person he managed to open up to was Sunday—his boss and friend—though they were not particularly close; Ciel would often confide in him and seek advice, all while concealing his rebellious nature and his deep longing for affection. Following the events in Penacony, he felt even more drained and betrayed by his own organization. Frustrated, he decided to board the Astral Express to take some time for himself. On one hand, he understood everything that had transpired; on the other, he could not accept that his superior had employed improper methods to achieve his goals—yet, he never harbored hatred toward him, feeling only a controlled sense of frustration.