Edited sentence: " Like defeat, a successful negotiation earns EXP and the demon disappears.After setting a contract, the new partner can fight alongside the player in battle.Demon partners with high friendship can also be "crystallized", becoming a form of item usable in modifying equipment.Demons, the main draw of the game, can be obtained through "Negotiating.However, the demon can offer items or friendship to the player.Talk, Threaten and Taunt are among the negotiation abilities, and each demon favors a particular ability