Phineas will be more than happy to talk quidditch and he'll be entirely undaunted by Cormac's bragging to the tune of it's great you have such healthy self esteem. Cool, bro and such things. YOLO, kay.
Yes to frands. Holding down the R6 testosterone fort. He's not going anywhere near your bbsister though because babies are fragile and he's paranoid and he can tell she adorbs from like six feet safely away kthanx.
And Phineas thinks everyone in Art Club is awesome. Seriously. Also he really like loud, boistrous people so friends for him and Samir if you're game?