Aliasing demon_girl → demon
Link to alias

Reason:

Redundant.

Just as with catgirl, this one could be also be aliased to 'demon_humanoid', yet it is probably easier to simply leave it at demon, and let the user add further search criteria.

Sounds about right. e621 doesn't generally use gender-specific species tags. (Lioness, dragoness, peacock/peahen, etc.)

Looks like demon_boy could use the same alias as well.

+1

Approved