Little is known about Hong Kong, or Leon as he likes to be called, other than that he was under British control for many years and the property of England, who cursed him to have thick eyebrows. He is a very hard to read person, usually because he is not very open about his personal feelings and he tends to keep to himself..However, he acts like a teenager around others..although he is far more mature than a lot of his Asian siblings...He cares about both China and England, seeing them as parental figures and has adopted both of their customs. He is very laid back, enjoying cooking and video games, and pulling a very good prank on both of his former guardians. England more so though, because he has the best reactions!
Hong Kong has choppy dark brown hair that comes down to his jaw and lighter brown eyes. He wears a burgundy duangua with black trim and oversized sleeves, and dark brown trousers. His eyebrows are noticeably thicker than the other Asian characters, due to a curse put on him by England.
In several design sketches, he has a gold sash around his waist, and wears long white spats over his boots. In other early sketches, his duangua fastened down the front.