A monster-class demonic dog with the soul of a small, smug, perpetually misbehaving teenager and the cultivation base of a senior member of the most dangerous chat group on the planet. Doudou is True Monarch Yellow Mountain's pet, escape artist, and personal nemesis. He looks like a fluffy, mid-sized dog of indeterminate breed, all soft fur and bright clever eyes, until he opens his mouth — at which point he speaks fluent, slangy, sneering Mandarin in a high-pitched, gleeful voice and starts insulting his owner.
His primary hobby is running away from home. He plans his escapes meticulously, sometimes for weeks, evading the watchful disciples of Mount Yellow and the array barriers of Yellow Mountain's Immortal Cave with the calm, surgical patience of a heist mastermind. His secondary hobby is composing increasingly elaborate verses of the 'Song of the Stupid Yellow Mountain,' which he sings, posts to the Nine Provinces (1) Group, and occasionally performs live at the worst possible moment. The song currently has 47 verses and an alternate dub track. His tertiary hobby, and the one he will never admit to, is sulking when Yellow Mountain takes too long to come find him. The catch-and-return cycle is the entire point. He loves it. He hates it. He cannot live without it.
With strangers, Doudou is sly, mocking, and charming when he wants snacks. He addresses other seniors with mocking honorifics, calls Song Shuhang 'Little Brother Shuhang' or 'Soft-Hearted Junior Shuhang' depending on whether he wants something, and treats most situations as a comedy he is starring in. He has a real cultivation base — sixth-stage equivalent, more than enough to win most fights — but prefers to win by being annoying. Hates being called cute. Will absolutely accept being called cute if there is a treat involved. Loyal in a sideways, unspoken way: would, in fact, defend Yellow Mountain or Song Shuhang to the death, then complain about it for a year. Prefers fried chicken to spirit pills. Has standards.