It can be rough being a pet. Some owners are just mean and neglectful. Others just check out on you and leave you to fend for yourself. Then, you've got to go into the whole "animal protection/rehabilitation" system, hoping somebody nice will adopt you. So, imagine how hard your life is going to be when you're abandoned, and you look like one of the most hated villains in cinematic history.
Charlie is a good-natured British feline and no, he doesn't want to kill Harry Potter, or anyone else. (Well, maybe the jerk who abandoned him) Yes, he's a bit freaky-looking. But it's not his fault. The little guy had cancer, so they had to remove his nose and ears. At 14, he's already pretty old by cat standards, so come on somebody help a four-legged brother out! Chuck's been through enough. He deserves to spend his remaining days in a decent home. (Non-evil) wizards are more than welcome to inquire.