nalia-
advantages....best str of the 3, in the beginning she can pack more stuff for the party...not an inconsiderable fact until you get a certain item that makes inventory a breeze...her ring gives her excellent fire protection, a robe of fire resistance makes her immune to fire...useful tactically...
disadvantages...her trap dectection is acceptable, but her unlock, which means how well she can unlock and disarm traps is bad...one of her ring slots is unusable, which means that you can only give her one enhancing ring...but her family ring is very powerful in itself..
imoen-
advantages-her unlock skill is very good indeed, she is acceptable for the trap disarm and detect traps and open chests for the entire game...she really is all the thief you ever need thru the game...she is very fun and cute as a button, and just all around nice npc...very easy to like..
disadvantages- her strength is low, and until later in the game, with many str enhancing items are availible, she can barely tote her necessary equipment...
janny-
advantages...best thief in the game, he will actually level up as you play, and when he gets high enough, his special abilites are amazing...very powerful magic user, with the one extra spell per level of a specialist mage...really a fun and funny npc
disadvantages....turnip stories...