Fiona is a semi-feral tortieshell cat of unknown breeds. She was born on St. Patrick's Day in 2003, but didn't enter the Valley until 2004, wherein she spent most of her time living in Atroe City amongst the abandoned houses and littered alleys. Later on, she joined with the Ancient Guardians for some time, until their untimely demise in 2010; Fiona was one of the lucky members to have survived the crippling sickness that killed so many there.

Today, this cunning feline roams between the Wild Lands and Atroe City.