Quentin Lance is a former detective on the Starling City police force who was demoted back to beat cop after the events in "Sacrifice." He is also the father of Laurel Lance and Sara Lance. 

He was once committed to bringing down The Hood at any cost, but after The Undertaking he had a change of heart and has started to work with The Arrow (a name he decided better fit the vigilante) to help him fix the broken Starling City.

Quentin Lance Quotes

You sent Felicity Smoak to warn me to leave town. You know The Arrow. You're the girl in the mask. You've been kicking the crap out of creeps in The Glades.

Lance

Warrior: Guns are a coward's weapon. What are you without your sidearm?
Lance: A guy with a spare.

Arrow Quotes

Diggle: I see you brought your plus one.
Ray: Nice to meet you. Ray Palmer.
Diggle: John Diggle. [whispering into Ray's ear] You hurt her, they'll never find your body. [louder] Nice to meet you!

There is a prophecy. The man who doesn't perish at the blade of Ra'a al Ghul will become Ra's al Ghul. Ra's al Ghul doesn't offer, he orders. Oliver! Don't delude yourself into thinking you have a choice.

Malcolm