Gilly is a member of The Smell.
At some point in her life, Gilly used to be a nun, but left as she realized holy life wasn't for her.
Three nights after Charlie joined the Legends, Atropos arrives to their concert. She kills Ian, as well as many fans. Then she kills Gilly in front of Declan, before reverting to her true form and killing him.
Charlie finds a way to resurrect the members of the band, Gilly included, and they perform a concert together with the Legends among the audience.
DC's Legends of Tomorrow
- Gilly loves monkeys.