I don't know if this has already been addressed, but I discovered a serious hack. What I did: In the prologue, right after Windego blows stuff up, I went into the hull and killed all the origin characters. Later on, once I got to the beach I found Red, Ifan, and Sebille back alive. At first that was kinda confusing, but this is where it gets real weird. After I recruited them I got into a fight, but they weren't getting drawn into the turn based combat. Turns out, they couldn't get into any combat, but they could still attack people. So I take Sebille and like level three I killed alexander and the worm thing no problem. Thinking this might just be some weird random thing, I started over and tried to duplicate the results. Same thing happened. Again, majorly gamebreaking, but may have already been fixed in release patch.
