The villan's right hand girl ( your avatar reminds me of a villan in final fantasy 13)

(Really? That's awesome. xD I like that title!)

A mercenary working towards a greater cause

The one that pops up to say sorry you died.

( Oh I know what character fineheart is thinking of! Can't finish the game cause it won't let me save anymore UGH.)

Anyways Silverwing is the ugly hag in the dark creepy forest you can either help out or ignore. If you were to ignore her (or worse) she'll transform into this totally hot chick and curse you for your shallow and evil actions/heart.

A strong swordsman with a dark past. You learn about his dark past way late in the game. His dark past was that he lived his life all alone, having everyone reject him because he was different. Running from town to town, trying to find someone who would accept him. Took him over 30 years to find the main party, and finally finding a place where he can belong.

One of the main characters, probably the Action Girl Warrior type.

A helpful character to appear in a vision to the main protagonist received in a drug induced hallucination. xD

The wary ranger that doesn't trust the protagonist even after the quest has been completed

The drama-causing diva at the beginning of the game that gets taken hostage by the party accused of a crime not committed. She's really annoying though so they push her off a bridge into the water below while continuing to run for their life.

The useful party informant who passes off dandy information and occasionally items until he tries to kill you later revealing he was actually a spy for the bad guy.

It reminds me of an Aegyl from FFXII:RW ... So that's my answer. The character that can fly to hit the flying enemies ^^;

Albino drow priestess. Due to her appearance she hardened herself to be ruthless. Despite her relation to a drow that joins the party do to strange circumstances she does try to kill them all by threatening their homes.

Token elf rogue character. In the main party but not the main character.

Water/Ice nymph Either they kill or help you depending on how they are feeling that day. If they help you, you get ice based items or they freeze ya to death. You seem like the kind that kills the hero because they bothered you for no reason.

An NPC that trades magical items to the user for particular items of interest to her. She is found in a cave under a library.

The hot villain o\\o;