Haha Lee is the son of a therapist so he is no stranger to the let's talk about our feelings approach. Mainly though he is all excited there is someone else with a tarantula. He would suggest a play date but um, they'd eat each other. Lee loves spiders and all kinds of gross, ugly, and weird animals. The cute ones aren't so interesting to him. He also lives commentating Quidditch and will know Phineas at least by name from that. Lee us paypal to, although a mischievous prankster as well. He also loves music and girls. My question for you is would Lee have known before Phineas' entry that he had a tarantula because that will basically determine whether Lee is buds with him or not :-)
I also have Barney Dunstan, a bouncy Hufflepuff in his year who is mad about Quidditch and all kinds of sports. Barney is also ridiculously well adjusted because his family are like a sporty version of the Waltons, they all like each other. It's crazy. Barney isn't the brightest and is the kung if rub on sentences which really confuses some oriole. He's really nice, though. It has been pointed out he always smiles except when Harry cheats. Barney will know him vaguely because he is friends with Hamish and would have played Quidditch against him. Barney talks to everyone, so be warned.
Then I have Mel, who is my super opinionated feminist and Marxist and lover of debates and politics. She's a fifth year Gryffindor. She likes Quidditch but hasn't made the team yet. She also likes boys and I am sure he will have caught her eye at some point.