[Chewbacca]

You can use persuasion to get all the class-based quests except for the mage's, at least in chapter one. Persuasion will pop up in the dialouge string with whoever is giving the quest. If you fail you can try again. My druid completed all of them, except the mage of course.

I dont know which keys you have ,so I dont know if they are for this quest but...

Spoiler for a rogue quest in the city core!
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A rogue quest is innitiated by a lady named Ophala and she is found in the moonbeam mask in the city core. Have a good thief handy for this quest!