Oliver Queen (Justin Harley) is a billionaire who lives in Metropolis.  He is the alter ego for the Green Arrow, vigilante who uses a bow and arrow and high tech equipment to help find crime.  Oliver has had a relationship with Lois and helps Clark.

Oliver Queen Quotes

I was looking for Tess when the whole building went Resident Evil.

Oliver

Oliver: Should have known it was you. Clark Kent: the king of buzz kill.

Smallville Quotes

I'm about as real as it gets.

Chloe

Oliver: You've done a hell of a job keeping the world safe on your own, Clark. I'm here to help you now.
Clark: Good. Something tells me...soon the world will need all the help we can get.