It is possible. Just go into the editor and open up the categories pane from the panel on the right side (clicking the arrow on the right side of the screen to open that panel). Then, scroll down to the Categories section, mouse over the category that you want to remove, and click the trash can icon on that category. After you've made whatever other edits to the article you want (which could be no edits), click the Publish button. That should remove the category for you.
I know that the Ominous from Sonic Overload (Or "Bad" Ominous) wasn't that redeemable, but what about the "Anti-villain" Ominous (Or the one that I've already wrote a sympathetic personality for)? Do you think he should be redeem or not, and if so, why or why not? What do you think would be a fitting punishment for him if he shouldn't be redeemed? Thanks for the reply if you wanted to or already did, sorry if I bothered or upset anyone, and have a great day.
OK, I know this is a weird question, but like it says in the title, I have a character where, if you would be interested in adopting him, I'd be happier having you have this character than personally having the character, as I'm unlikely to ever want to use this character and you could likely make good use of him. The character in question is Kashon the Mouse, a character who doesn't have a page yet (though I do have some information that I could toss in a Google Doc if you're interested), but he is in The Curse of Day/Part3H and The Curse of Day/Part4, which should give some general idea of his character. Anyway, if you're at all interested, please let me know, and we can work out the details (e.g. I can give any more data I need, etc.). If you're not at all interested, I'll keep holding on to the character, but just in case you are, I thought I should ask.
I guess he's kind of dark and rough in a way that I find annoying and so mostly just kind of try to tone down, but Crimson could probably bring this guy to his fullest potential and do something interesting with him in a way that I just wouldn't be interested enough to get that far with. (I do have an alternate version on another wiki who I do want to keep, but for the Sonic Fanon version, I think that, if Crimson wanted him, this would work best.)