The actor plays mysterious Division operative Michael, who shares a secret past with Nikita (Maggie Q).
He told the Los Angeles Times: "Michael's not inherently a bad guy, at all. He's doing some things that I think he started off believing in, and now he's a little unsure. But he does have a good heart."
West added that his character's loyalties are "very complicated" and that he considers the Division to be "kind of his family [with] the recruits".
He also admitted that he is uncertain about the specifics of Michael and Nikita's past.
"He trained her [and] helped her out when she joined Division," he explained. "We haven't got into the details of [their history] yet and we're not necessarily sure where it's going to go."
Nikita will premiere on September 9 on The CW.