"That explains why they follow Harry" Hermione sniggered."I am an absolute innocent angel" Harry declared, his friends dissolving into giggles and laughter at the serious tone the boy had adopted."You're a Cambion, just like the rest of us" Draco snorted."You lot are impossible" Harry sniffed, before sitting down, unfortunately due to the amount of them in the limited space, he ended up sitting on Theo before the brunette pushed him off onto the floor with a yelp."We should've gotten a bigger compartment" Harry grumbled as he rubbed his lower back."We can do the extension charm" Hermione said looking at Harry curiously. The charm was extremely difficult, most seventh years couldn't do it correctly, it was also regulated by the ministry because if used in Muggle areas it could risk their exposure. Over the summer though Rabastan and Rodolphus had taught it to them, because of the difficulty of the charm, they had struggled alone but together they had managed.