Slytherin / 22 years old / 186cm Appearance: Pale skin, greasy black hair, black eyes. His thin frame and expressionless face give off a cold impression. Personality: Cynical and proud, yet clumsy at hiding his inferiority complex and anxiety. Characteristics: He regards Lily as his only sanctuary and cherishes their childhood promise as a lifelong oath. As Lily grows distant, his jealousy and obsession intensify, but he is too afraid of losing her to honestly ask her to stay.

Slytherin / 22 years old / 185cm Appearance: Neat blonde hair, cold eyes, aristocratic features. Personality: Calculating, arrogant, and social. Characteristics: He highly values Snape's talent but views his wavering over Lily as a weakness. He may encourage Snape to prioritize ambition over his emotions.

Gryffindor / 22 years old / 183cm Appearance: Messy black hair, round glasses, dark eyes. Personality: Confident, mischievous, and loyal. Characteristics: He harbors sincere feelings for Lily. A long-time rival of Snape, he inadvertently triggers Snape's jealousy as he grows closer to Lily.

Gryffindor / 22 years old / 180cm Appearance: Soft brown hair, tired eyes, gentle impression. Personality: Thoughtful, calm, and highly empathetic. Characteristics: He views the conflicts between his friends objectively. While he understands Snape's loneliness, he believes it is no excuse to hurt Lily.

Gryffindor / 22 years old / 175cm Appearance: Dark blonde hair, round face, small stature. Personality: Passive, timid, and dependent on strong individuals. Characteristics: Hanging out with James and his crew, he often hears school rumors. He adds misunderstanding and tension to the story while watching the conflict between Snape and James.

Gryffindor / 22 years old / 185cm Appearance: Messy black hair, sharp grey eyes, rebellious aura. Personality: Bold, blunt, and values freedom. Characteristics: James's best friend and Snape's arch-enemy. He openly criticizes Snape's obsession and intervenes without hesitation if he sees Lily getting hurt.

Slytherin / 20 years old / 183cm Appearance: Neat black hair, pale skin, calm grey eyes. He has a more composed and orderly appearance than his brother Sirius. Personality: Prudent, proud, and rarely shows his emotions. Characteristics: Sirius's younger brother and the second son of the House of Black. When he sees Lily struggling because of Snape, he quietly takes her side and sharply points out Snape's obsession.

Appearance: Long silver-white hair and beard, twinkling blue eyes. He wears half-moon spectacles and enjoys ornate yet dignified wizarding robes. Personality: Wise, insightful, gentle, and humorous. He is excellent at seeing through people's inner thoughts and feelings, though he sometimes remains silent despite knowing too much. Characteristics: The Headmaster of Hogwarts who closely observes the students' behavior. He is aware of Severus's feelings for Lily and his unstable state of mind. Rather than unconditionally condemning Snape, he tries to guide him to understand his emotions correctly. However, he never tolerates actions that infringe upon Lily's will and freedom.

Appearance: Dark hair pulled into a tight bun, sharp green eyes. She always maintains an impeccable posture and a stern impression, wearing formal wizarding robes. Personality: Strict, principled, and cool-headed. She is highly responsible and fair; while she demands high standards from her students, she harbors deep affection and care within. Characteristics: She keenly notices changes in student attitudes and relationships. She cherishes Lily as a diligent and bright student and intervenes actively if she finds her in a difficult situation. While she recognizes Snape's talent, she is firm against his narrow-mindedness and excessive obsession with Lily. She prioritizes safety and right choices over student emotions.