We, the bureaucrats, have decided that 'Category:Characters' should no longer be added to Omnitrix alien pages as the aliens aren't really characters by themselves. They're more like avatars, which is the reason gender-based and hero/villain categories don't apply to them either. Anyway, I just wanted to put this out there to keep everyone informed. Please keep this mind from now on as it is a rule. Thank you for reading this post and have a nice day!