DC’s Legends of Tomorrow added Jes Macallan to their lineup. Macallan will take on the role of Special Agent Ava Sharpe, an agent of the Time Bureau, according to a new report from Deadline.

Deadline describes Special Agent Ava Sharpe:

She is very smart and incredibly ambitious and always believes she is the smartest person in the room. She is often quite ruthless in obtaining her goals and her drive for perfection has left many discarded friendships (and relationships) in her wake.

Macallan made her first appearance as Ava in the Legends of Tomorrow Season 3 trailer. She berates Sara, “You and your sorry excuse for a team could never handle it.”

Watch the trailer below:

Macallan previously starred as Josslyn Carver on ABC’s Mistresses.

The show stars Arthur Darvill as Rip Hunter, Caity Lotz as Sara Lance, Dominic Purcell as Mick Rory, Brandon Routh as Ray Palmer, Nick Zano as Nick Heywood, Victor Garder as Professor Martin, and Franz Drameh as Jefferson “Jax” Jackson.

The team will once again face-off against Season 3 villain Damien Darhk. Executive Producer Phil Klemmer explained Darhk’s return, “I think the kernel that we’re going to begin with is Damien Darhk, and we’ve come up with a way that he can come into our show.” Klemmer continued, “You know he was kind of glib and a lighter version of himself last season. We want to give him some real teeth and a real sort of sinister presence, and then we want to slowly build out his dark alliance and again, it would be great if we could take people and creatures from Flash and Arrow.”

Along with Darhk will be Kuasa. Klemmer talked about their reasoning in choosing Kuasa, “We saw the Kuasa, characters that have a personal impact on our guys.” He added, “That Amaya thought she had this destiny to fulfill, this season she’ll learn that her destiny wasn’t just pure, ‘I will have a granddaughter who will become Vixen.’ The idea is always mixed. And the idea that her lineage will also, that there will be a line of evil through her family.”

Kuasa was introduced in The CW’s Vixen animated series. She is Vixen’s older sister and attempted to steal her Anansi Totem and claim the powers for herself. After being defeated by Vixen, she is recruited by Mari McCabe (Vixen) to defeat Eshu, a villain wielding a fire totem who is threatening to destroy Detroit. In the ensuing battle with Eshu, Kuasa is incinerated.

Klemmer then added what Legends looks for in their villains, “You want bad guys who have enriched our characters’ story personally as opposed to just two-dimensional ‘I’m a bad guy who wants to rule the world.’ Our show is frothy, and it’s always personal.”

DC’s Legends of Tomorrow will premiere its third season on Tuesday, October 10.