Baizhu is introduced in the quest "Guizhong," after the Traveler and Zhongli return to Qiqi empty-handed after she asks them to hunt down a "legendary adeptibeast" called the "cocogoat." After they realized that Qiqi had been looking for coconut milk all along, Baizhu shows himself and reveals himself as the owner of Bubu Pharmacy—something even Zhongli didn't know. He offers three million Mora in exchange for Everlasting Incense, a hefty sum that forces the party to ask Childe to pay for them.
Many rumors swirl about Baizhu, though most of the rumors are unknown—besides the fact that his traditional herbal medicines are extremely bitter.
He took in Qiqi, despite being a zombie and having a terrible memory, for yet-unknown personal reasons. Furthermore, it appears he only cares about her insofar as her use to him goes, as he has "no element of sincerity" when attempting to cancel her orders by saying that he loves her, and that she usually forgets how he looks like. At the same time, he also easily caves whenever she demands something from him.
Baizhu is also somewhat of a shady merchant; although his products are genuine, Changsheng remarks he is always looking to fleece others of their Mora. Despite her warnings, Baizhu does not appear to mind.
Baizhu is a tall man with light skin and green hair reaching his shoulders. He has golden eyes and is always seen wearing a pair of red oval-framed glasses.
Baizhu is often seen with his pet snake Changsheng draped around his neck like a scarf. He also wears a cropped short-sleeved shirt and indigo pants. Over this Baizhu wears a teal-blue sash, and a pale blue jacket draped around his shoulders like a cape.
Herbalist Gui, another employee of Bubu Pharmacy, remarks that Baizhu suffers from an unknown ailment that makes him rather frail. Qiqi, despite being a zombie who has to regularly exercise in order to stave off rigor mortis, is in better physical condition than he is.