Information - Relationships
As stated before, as wonderfully diverse the cast of Atelier Iris 2: The Azoth of Destiny is, there isn't too much interaction between Fee and the other characters.
Felt Blanchimont is obviously, at first, her target of assassination. After this, a friendship follows as Felt is innately supportive and caring of everyone. Interestingly enough, there isn't a romantic relationship between the two. Felt's romantic interests are strictly Viese, and to a somewhat lesser extent Noin.
Noin and Fee don't interact very much at all, but they don't seem to hate each other.
Gray, next to Fee, is the most serious of the characters. Whenever something major's happening, it will usually be him bringing something up. Later in the game, it appears that he sticks by Fee's side as a counselor once she becomes queen. There's definitely a bond of trust between the two, as they are both serious and down to business.
Poe... well, Poe hit on Fee at first, but then hit on everyone else, too. Fee doesn't seem to really pay much attention to him or his flirtative nature.
Max, her brother. Not much interaction is seen, but Max obviously considers her very important given that she's the only new person he's known that he bothered to remember the name of. Poor Felt probably got called by no less than ten different names throughout the game.
Theodore, oh Theodore. Everyone hates him. He's a coward and likes to abuse his power. So, along with everyone else, Fee opposes him.
High Priestess Eizlen is Fee's adoptive mother, so of course Fee considers her very important.