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

She's always been there. She's my rock. She was my rock.

Lance

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

Arrow Quotes

Every warrior must learn the simple truth -- that pain is inevitable and suffering is optional.

Malcolm

Laurel: Helena, you don't have to do this.
Helena: Yes, I do. Because once you let the darkness inside, it never comes out.