Who is the attacker in a dream of red mansions? Why is it called xiren? What is the source of the attack?

Xiren, the eldest daughter of Jia Baoyu, belongs to one of the twelve women in Jinling. Xiren used to be the second-class maid pearl around Grandmother Jia. Later, after she gave it to Jia Baoyu, Jia Baoyu changed his name to Xiren, and the name came from the poem "Flowers smell fragrant, people know the warmth of the day".

The third original of A Dream of Red Mansions:

It turns out that this xiren is also the maid of Grandmother Jia, whose real name is Pearl. The Lady Dowager dotes on Baoyu, fearing that Baoyu's servant girl will not have a devoted and loyal person. She is always ready to attack others and is willing to do her duty. Baoyu knew that his real name was Hua, and he had seen the phrase "flowers smell sweet" in the old man's poems, so he went back to the old lady of Ming Dynasty and changed his name to Aroma.