A whole had passed, and Casimir's compartment still remained empty of anyone else but himself. It wasn't of any concern to him honestly, he ha grown used to the solitude of every train ride and school year. Often times people simply avoided him because of the rather... awry reputation he had built up for himself. Aside from knowing a great deal of magic, Casimir was known for his vengeful actions and willingness to use what he knew to get back at someone who had wronged him. He had already proven this several, several times, but was thankfully not banished from Hogwarts because the hexes and jinxes he used against others did not cause extensive or serious harm.
He sat and simply "conversed" with his owl, making quiet comments about the cheeriness of the voices he heard... and their casual dialect. Casimir could be casual, but often times he spoke in a rather "proper" manner.The vvoices annoyed him a bit, especially a certain girl's voice that was very bubbly and "cutesy". He thought he knew who it belonged to... Samantha maybe? That girl was the definition of outgoing and social. He never had any problems with her however, at least not serious ones.
This was going to be a long wait and ride, so Casimir pulled out his dark wand and began casting spells on random objects he had spread out before himself. They were lifted up into the air, tossed around, even transformed into something else and lit on fire. He kept it controlled so as to not draw much attention to himself or wreck anything, and gave occasional treats to an observant Jersey. Casimir considered trying out a tranfiguration spell on him, but the last time he had the poor owl ended up as a feathery and walking cup.
"Eh... living creatures are harder to change than nonliving things," he told the owl. "But don't worry, I think I've gotten better since that time."