Trick or treat 2018 : colored (Patreon)

Lua and Nell are wearing superheros costumes.
Lua is the villain, wearing a symbiote that would make her rabbid and a serious threat to the whole world ! Only the chastity belt prevents the symbiote from controlling her body and release her full power.
Nell is Superbrat, the girl with a perfect butt and the duty to guard the drow slut and protect her belt, so nobody ever releases the evil symbiote.
How do her trick and treat toys help her in that mission ? ... do they have to ?