[quote=@HeartlessNobody]
How many "dark" characters are there then? My curiosity has been peeked!
[/quote]

Oddly, as of the beginning of the last season of Athalia there was only one character that had Darkness Manipulation, and he's dead.

As for dark aligned characters, if you're including villains there are a lot, but if you're only including those supposedly on the Athalia side there are few that stray to the dark side of the moral spectrum. Mizuki is one for the time being, but she's not of the type to want a sword of darkness. The only one she'd be interested in would be the fire sword, but even that is questionable at best because her fox-fire is plenty potent already. If the wiki was updated I could give you a definitive answer on how many dark characters there are, but alas.