JKSManga
so it said Sam looked at the last 3 people then talked about chucky and Helen but no 3rd person, I'm assuming this last person was the shadow user Quinn had to bring and as for Helen going I'm thinking Helen is going to try get close to Quinn but Quinn's going to be super busy constantly going out on demigod hunts alone and eventually Helen is going to sneak along with him and see all of his powers and Quinn will find out then either Helen and Quinn get close with Helen staying human or she almost dies and Quinn has to turn her and her and Quinn get close.