Quark

Quark is the bartender on Star Trek: Deep Space Nine and the brother of Rom and uncle of Nog. He is a Ferengi (alien species).

Appearance
Quark is rather average-looking by Ferengi standards, and he generally wears flashy coats, shirts and pants.

Personality
Quark, like most Ferengi, really enjoys making profits, he especially likes gaining latinum, which is a currency among Ferengi. He is a bit grumpier than his brother Rom and sometimes complains. Quark is not above breaking the rules to make a profit (which makes Odo very suspicious of him) but he has standards, and wouldn't hurt or kill anyone to make a profit (although he's not above conning people).