Why is Dangerous Beast a character tag?

Just asking, why is dangerous beast a character tag? halloween princess (fate/grand order) and halloween petite devil (fate/grand order) aren't considered characters, so why is Dangerous Beast different?

Not sure, probably the initial tagger made it a green tag and no one bothered to change it. Changed it to blue since it's an outfit and not a character.

It seems there's an extraneous dangerous_beast_(cosplay) tag as well. I'm considering removing it, but I need to know of any potential snags. So far I've edited out shielder_(fate/grand_order) from the tag so a dangerous_beast -shielder_(fate/grand_order) search can work properly.

It's green to stay consistent with CEs such as formalcraft and limited/zero over which are considered characters (never seen the ones you mentioned so that's a little confusing). People tagged it with Shielder because the dangerous beast tag wasn't made until pages of dangerous beast pictures were already posted and it was her outfit.

Looks good now. Should probably hold on before nuking the dangerous beast (cosplay) tag though.