Kensi Blye - NCIS: Los Angeles
In Season 5, Kensi was ordered to take out the "White Ghost" while serving in Afghanistan. When the target turned out to be her ex-fiancé, Jack, she missed the shot on purpose and later took off alone on horse, with no weapon, to find him. All of this against orders, by the way.
Don't play the renegade card against Kensi Blye; she'll play it right back, and harder.
Watch NCIS: Los Angeles Mondays at 10/9c.