Woo is a character featured in The Catwoman From Channel Six. April encounters him behind the counter of Woo's Oriental Palace, asking "are you Mister Woo?" and he answered "I am Woo!". This happened while following a lead, as she found Bebop and Rocksteady had left behind food boxes from the restaurant at the turtle's lair when they accidentally teleported there and began to fight.
Woo recognizes her description of the pair who bought the food and directs her to the warehouse he thinks they came from. He may have seen them coming or going, or his contacts may have known that information.
He is a tough guy, as seen when a tall muscular guy berates and shakes him, wanting his order to come faster. Woo ends up grabbing the guy's arm and judo-throwing him into a wall.