In the whole wide (Wizarding) world, there are a lot of great characters out there. But there is perhaps none so important to the trajectory of Harry Potter's life than Sybil Trelawney, the prospective Divination professor who proclaimed a prophecy that set He Who Must Not Be Named on a collision course with our favorite boy wizard...

There are a lot of great sidekicks out there, but I think it's unfair to count Ron Weasley among them. Though he certainly is Harry Potter's best friend, through the course of the seven Harry Potter books, Ron does more than serve as second fiddle to Harry. He's his own character, makes his own decisions – including mistakes –, and grows to become a hero in his own right...

The world of Harry Potter is full of distinctive characters, but there are perhaps none that have such a distinctive appearance and have such an unforgettable introduction as Alastor "Mad-Eye" Moody. Even when he's being impersonated by Barty Crouch Jr. in the pages of Harry Potter and the Goblet of Fire, Mad-Eye Moody strikes an impressive, imposing figure – and actor Brendan Gleeson does an incredible job of bringing this character to the silver screen...

There are some real baddies in the Wizarding World... Voldemort, the Death Eaters, Bellatrix Lestrange, and Severus Snape (okay maybe not all bad but still not a nice guy!), just to name a few. But there's nobody who makes my blood boil more than Dolores Jane Umbridge, Senior Undersecretary to the Minister for Magic and former High Inquisitor at Hogwarts...

If there's one character that fans of the Harry Potter series universally love, it's Sirius Black. Loyal as a dog (pun intended), Sirius does his best to live up to his godfather duties after Harry discovers the truth of who's responsible for revealing his parent's whereabouts and causing their death. He provides support, care, and a much-needed parent figure for Harry in the few years they know each other...

For someone who lives in a toilet at the entrance to the Chamber of Secrets, it's really no surprise that Moaning Myrtle isn't the most pleasant person and lacks social skills. But many people loved her portrayal in the Harry Potter movies and want to dress up as her, whether for Halloween or your favorite Cosplay event...

As you get discover more of the Wizarding World, you might find yourself wanting to dive deeper – maybe even dress up for those days when you're just really feeling like you need an escape from your Muggle everyday. And what better way to completely change how you feel about whatever situation you're in than by donning the dark robes of a Death Eater costume...