Hei is of Russian origin, but his mother was Chinese. He was raised like a normal child, and his family is still alive and kicking, he is 22 years old, bisexual, 6'2", red eyes, oh, and don't worry, he was dead inside before making his shop. He received normal education.
Ok, now that we're done with the normal stuff, let's move onto the abilities. Hei is unable to feel pain, physical or mental, and cannot get sick for some reason. After cultivating to overlord level, he is able to run at the speed of sound, and able to punch with a power equal to 25 tons, he could hear things around 1km away from him, and scent blood from the same distance.
His favourite things are villain songs, SCP containment breach, and memes. He despises people aside from his family and customers.