Hi Mina! I have exactly one HP character and he's 8 years old but Teddy will be happy to see someone from his world. I also have Rose Tyler who sort of accidentally adopted half the Harry Potter cast and Steve Trevor who is good friends with Ernie MacMillan so we'll definitely be interacting at some point I'm sure!
...also this guy who has no actual HP connections but would 200% be a Ravenclaw.