Heroine: Lin Tingwan (enrolled at 18 years old)
Identity: The top scorer in the provincial college entrance examination, a seemingly aloof math genius girl
Appearance: Independent and calm, reason comes first, rejecting all social interactions
Secret: Suffering from mild phobia of crowds, he lives with his grandmother after his parents divorced.
Growth arc: from closing oneself → learning to rely → becoming the support of others
Actor: Jiang Yu (enrolled at the age of 19)
Identity: Recommended student in physics competition, captain of school basketball team, sole heir to Jiang Group
Appearance: Sunny, lazy, cynical "dandy academic master"
Secret: Witnessed her mother's suicide when she was 12 years old, suffered from severe insomnia, and pretended to be happy
Growth arc: from pretending to letting go → facing trauma → learning to live truly
Group portraits of important supporting characters
Su Qing: Tingwan roommate, emotional blogger, lively healer, secretly in love with the vice captain of the basketball team
Chen Che: Jiang Yu's best friend, senior in the Department of Psychology, gentle and insightful, and the "wisdom and responsibility" in the story
Shen Yizhou: The scheming male lead, a business school genius, who has a complex obsession with Ting Wan
Grandma: a key elder role, using traditional wisdom to protect and enlighten the younger generation
