Batman is often helped from other people in Gotham. Batman and his some of his various allies are often reffered to as the Bat Family. Some of these people also put on costumes and become superheroes when they help him. Some of the notable people who help him are his sidekick, Robin (Dick Grayson, Jason Todd, Tim Drake, and Damian Wayne), his butler Alfred Pennyworth, police commissioner James Gordon, Wayne Enterprises CEO and president Lucius Fox, and Gordon's daughter Barbara Gordon. Barbara Gordon became a superhero named Batgirl (and later used the name Oracle). Commissioner Gordon uses a Bat-Signal which shines a light into the sky with a shadow in the shape of a bat on when he needs Batman's assistance. Batman is often, but not always, shown being friends with Superman. He is often shown as a friend of wonder woman. Batman, superman, and wonder woman are often referred to as the "Trinity". Batman is a part of many superhero teams that fight against evil, most notably the Justice League or JL for short, and or JLD. 