Han is a melting pot of identities. His mother and father met and fell in love quite accidentally, when she was young and couldn't find platform 9 and 3 quarters. A young muggle boy tried helping her, albeit quite confused, until her mother arrived and finally took her to the right location. This started out a friendship and a bond between the two. In secret, she would write to him via owl, and little by little, reveal things about the magical world. During the summers, they did their best to meet up and play. Eventually, the two fell in love, and by the time they were 20, had their first and only child- Han.
Han's father went on to become a stock broker in order to keep up with the family expenses, given how much more expensive the wizarding world is by currency. His mother became a Healer at St.Mungo's. Each worked long shifts, but still had time for Han. He lived as a happy little baby and, from an early age, he developed a love for art, despite not having the talent for it.
Han's first sign of magic was quite curious- he was shopping with his mom for outfits for school at about age 5, when, to his dissatisfaction, he noted how restricted the clothing section was. Racks started rolling from one side of the store to another, until the chaos finally settled and the gendered clothing finally became ungendered, with racks sitting in harmony in the middle of the store. Needless to say, it was clear he inherited his mother's magical ability. Even when he was young, he wasn't a fan of the roles and expectations set upon people based on their perceived gender. Han began playing piano when he was six, which developed his sense of musicality. While not the best, he tried really hard and eventually improved, building that sixth sense for music. His paintings did not gather the same improvement. His parent's discovered Han was slowly, but surely, going deaf when he was about 10. They thought about correcting it, after all the magical world allowed for things that only muggles could dream of- but they decided to leave that decision up to him, instead ordering some old fashioned hearing aids, and hired a tutor to teach him british sign language.
At eleven, the excited kid was finally sent off to Hogwarts. He made many friends in his first year, and started gaining new interests, such as in rom coms (even though they're kind of symbolically bad most of the time and perpetuate certain ideas), and in musicals, as a good gay must do. He briefly got into the furry scene but then backed way away from that. At about 12, he started learning how to b-boy, and that turned into a general love for dancing as well. For a while he thought exercising was kind of gross, that is until after he came out to everyone as genderqueer and wanted to radically change the presentation he had, which was at about age 15. That year was a year of transformation for him and growth as an individual. Probably his favorite class at this point is transfiguration, but mostly because of how nice the teacher seems. He is now in sixth year.