Fiona is the player’s girlfriend. The two of them had dated for 2 years and had planned on getting engaged. She is killed in very first quest of the game, A story begins.
Or…so you think. During the third group of faction quests you discover that she actually survived and is actually Nosferatu vampire bent on ruling the whole country.
If the player chooses to stay on as a vampire, she is the faction quester through the White Collar Crime quests as the player attempts to help her rig the NewIsle elections due to the mayor’s desth.