Don't read below this if you have not finished with Act 1 on EA.
Entering the boat, your companions leave to do their own things. The Red Prince seems to leave permanently.
Upon leaving, he takes all his inventory with him.
In my game The Red Prince was my deal maker, the one with 5 bartering and had all my 12k gold with him (all skill books and most of the gear).
I tried to steal some of my stuff back just to notice that all the money was gone.
Later we learn that he dies on the Dallis fight.
I hope this gets fixed in the final game, he should return everything he has. Even the gear he is wearing.
He was also my healer, so recruiting Lohse to be my new healer without any new skills for her to learn was kind a iffy.
Dallis fight with that kind of healer... no thanks.