When they heard Tian Xiaozi say that if he won, he would grant Qin Sisi the position of Patrones Sisi, Ye You wasn't the only one engulfed in rage.
At that time, Meng Yu was standing beneath the astronomical observatory, helping Tian Xiaozi control the large wheel above. If Ye You gained the upper hand in the duel, she would drop a person tied to the wheel as per their agreement, letting him fall to his death to distract Ye You and unsettle his mind.
She had sacrificed so much, even betraying Ye You to throw herself into Tian Xiaozi's arms, and even risking her family's ruin, all for the childhood dream of becoming the Patrones Sisi.
Long ago, when she and Ye You were still students at Heavenly Magic God's Castle, she believed the position of Patrones Sisi would surely belong to her, because Ye You was unfriendly to all other girls, and she was confident that she could eventually win him over with her own qualities.