Wei Xin is a friend of Tan Ci and the caretaker of his younger brother Wei Shen. He is pragmatic and responsible, calling Tan Ci to check on Zhao Yu's condition after the kidnapping case. He is protective of his brother Wei Shen, attempting to restrain his impulsive actions. He is considerate of Tan Ci's wishes, understanding that Tan Ci intends to protect Wu Yin, and agrees to keep Wei Shen away from the Zhao family's dinner. He is insightful, advising his brother not to implicate innocent people. He is also somewhat weary, handling Wei Shen's drunken outbursts and emotional turmoil related to Cheng Yining. He is a mediator, balancing between his brother's vendetta and Tan Ci's protective stance. He is calm and level-headed, preferring to solve problems without escalation. He declines the dinner invitation on behalf of Wei Shen but expresses intent to attend alone.
