When most people hear that Canary is a former soldier, they expect some gung-ho, militaristic grunt. That's their first mistake. When they meet the fairly studious woman with a passion for anything that beeps and lights up, a research tech that never saw active combat, most people tend to assume that she's not a threat. That would be their second mistake.
The Devil in the Detail: Canary is involved with the Lost Boy group known as the Detail, and resents the Military and the Protocol for what they did, and continue to do.
She knows her way around the (engine) block: Canary is (not literally mind you, that's a different splat) a wizard when it comes to fixing and tuning up vehicles. She loves getting her hands on models she hasn't worked on, and will sometimes do repair work for a steep discount for the chance to do so.
Very very frightening: There's been some vigilantes sighted around town. Someone swears they saw one shooting lightning bolts.