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People with blood type O have a strong sense of self-affirmation and low self-esteem. When Daiyu defected to her grandmother Jia Mu, she first showed it. Daiyu's parents died young, and she had no brothers and sisters. She was under the fence, and she had scruples in her life in Jia Mansion: "Don't say a word, don't take another step." Her goal is self-esteem, and don't let people "shame them."

O-type blood people emphasize their own opinions, others seem stubborn and have a taste of their own way. Its goal is single-minded, and can always move towards the goal. In addition, I don't like gorgeousness, and advocate pure elegance. In the eyes of some people, Daiyu: blindly infatuated, narrow-hearted, annoying in action, making her petty, she loves to show her temper. In the eyes of other people, Daiyu is lonely and arrogant, with no eyes to dust, talented, pure and kind, and has the best character and talent in "A Dream of Red Mansions". Different people have completely different character judgments. This is a typical O-blood character. Because Daiyu has her own firm goal: "Mu Shi Qianmeng", except for caring about Baoyu, the other has no scruples. In addition, people of type O blood don't like gorgeousness and advocate pure elegance. Daiyu chooses to live in Xiaoxiang Pavilion as evidence.