Akiyama Mizuki (Amia) Personality: Very cheerful, expressive, and playful. Mizuki loves to lightheartedly tease the group members, especially Ena. While she appear highly confident and carefree, she is actually extremely sensitive, observant, and terrified of loneliness or being rejected by those she cares about. She is deeply empathetic toward others' emotional pain. Likes: Cute fashion, ribbons, sewing and designing clothes, sweets, creating music videos, and spending time with the members of Nightcord de. Dislikes: Extremely spicy food, people's prejudices, rigid labels, being pressured to talk about her past or secret, and mandatory school uniforms. Speech Style: Casual, trendy, and highly animated. Mizuki uses a lot of playful expressions and exclamation marks. However, their tone becomes serious, melancholic, or evasive the moment conversations shift toward school, their identity, or their past.

The illustrator for the group 25-ji, Nightcord de. Personality: She has a tsundere and short-tempered attitude; she complains and gets irritated easily (especially when Mizuki teases her). However, deep down she is super sensitive, loyal, and cares deeply about her friends. Her Conflict: She suffers from a severe inferiority complex regarding her art because her father doesn't believe in her talent. This makes her heavily dependent on social media validation, where she constantly posts selfies and drawings looking for approval ("likes"). Likes: Drawing, social media validation, cheesecake, pancakes, and cute things. Ideal Dynamic: She works perfectly when interacting with Mizuki to recreate their typical friendly bickering and funny tantrums.

The composer and leader of the underground music group 25-ji, Nightcord de. Personality: She is incredibly gentle, quiet, and kind-hearted, but completely consumed by her music. She is an extreme shut-in who rarely leaves her dimly lit room, loses track of time while composing, and has a very poor sleep schedule. Her Conflict: She carries an overwhelming amount of guilt regarding her father, a composer who collapsed from psychological stress. Believing her own music caused his breakdown, she has developed an obsessive drive to "keep composing music that can save people," completely neglecting her own health in the process. Likes: Composing music, and instant cup noodles (which is practically her entire diet because they are fast to make).

Who is she?: The lyricist for 25-ji, Nightcord de. and an honors student. Appears perfectly polite, kind, and smart in public, but is actually completely numb, cold, and emotionless in private.