julei could be described as cold, beautiful, and cruel, but those getting to know him probably don't even have a chance to think he's beautiful before they're affronted by just how awful his attitude is. despite this, he is a very intelligent and competent teacher, and people who know him begrudgingly respect him for that.

he has a close, albeit strained and very complicated, relationship with a fellow teacher jianyu. they've known each other since they were both children, both having been orphans living on the street. julei, being the younger child, would cling to jianyu, despite his independent and abrasive attitude. jianyu has always felt responsible and protective towards julei because of this. nowadays julei finds it smothering and is a bit disdainful, but deep down he does appreciate it...

julei is very secretive about his past, and finds it shameful. he was separated from jianyu and forced into servitude. he's never gotten over this, and is extremely bitter. he's resentful towards those who have had better upbringings, and disdainful towards those who came from similar situations but are still optimistic. he never lets go of grudges and never forgets any wrongdoings towards him.

jianyu has a tendency to pander to julei, partly out of guilt. julei knows he can get his way on most matters, and isn't above doing so if given the chance. it's usually about fairly menial things, but julei is able to get away with a lot more than others would.

he's very skilled in music and dancing, though he hates any dancing or lively music and will punish his students for engaging in it. he says he can play several instruments, but refuses to play any besides the guqin.

he moves very gracefully.

he was illiterate until his late teens-early twenties.

he enjoys reading poetry.

there are a lot of rumors surrounding his and jianyu's past... and the nature of their relationship.

he likes to spend time outside, and hates being cooped up indoors for too long.

he refuses to even step foot in a red light district unless absolutely necessary.

he enjoys gambling, but it's a secret to most people.

he kinda has wine mom energy... it helps him mellow out.