Hermione was one of the few students without an animal companion during her First Year. She had considered acquiring a Familiar after reading her Hogwarts supply list, but ended up deeming it unnecessary and encumbering. As a result, it became an attraction to observe the rest of her classmates interacting with their own. The minute she boarded the Express and took note of how many students were carrying critters, she regretted not having one. The feeling dissipated soon enough when she witnessed their constant escaping and running havoc. They were a hazard. She was pleased with her smart decision in a matter of minutes. 