probably can also only be defeated by torches or something.

A disillusioned dancer who you find sprawled in the snow in front of your party's keep one morning. Getting them indoors is a bit tricky, but becomes easier after the mage figures out that moving half-incorporeal bodies is significantly easier with the use of magic.

Halfway through the main storyline, your bard is revealed as a spy for the main antagonist, and their betrayal leaves a gaping hole in your party lineup. If you've completed the first part of Mer's companion quest, you can take them along with you on your travels, which allows you to eventually encounter the trigger for the second part of the quest, after which her bardic abilities are significantly boosted.

The main protagonist of a futuristic fantasy game, OR
a character in a futuristic fantasy game which sides with the protagonist and becomes the speedy tactician of the party. They've got little strength and defense but they more than make up for it with their speed, precision, and brilliant boosts in ability points, making them very useful for evading danger, strategic boss battles, and is the character with the most weapon choices.

They've also got a cool ass cyborg backstory likely involving a main antagonist or their tech corporation.

Mage in back of the group

The sultry side character that likes to tease but also gives good advice to the main character. Probably has a hidden secret that the main character is tryingt to figure out.