I don't know if there is another thread about it but I think it would be great if players would have the possibility to exchange characters between them and I don't think it would prevent players to spend money in the game.

e.g; you have Charlotte x2 but do not have enough gold during a sac event. Maybe you could propose charlotte for sell with a kind of bid auction or at fix price. Against gold or ironite or skill shards.

What do you think?