Talk:FAQ/@comment-37.117.134.255-20150219170756/@comment-9571656-20150219172237

No any quest that you unlock stays even if you sell off the other Arcana or fuse it to another.

HOWEVER there are some character quests that can only be reached when that characters arcana reaches a certain level and these you will not be able to acess without lvling them up.

Example the first 3 characters you get (Kain, Marina and Michida) each have 3 quests with the final one only being unlocked ounce they reach Level 40. BTW These quest give GOOD weapons that you WILL want to be careful who you equip them to.