Dr. Leo Scarlett is a scientist from Gotham City.
Physical appearance[]
Leo is a heavyset man with balding black hair. He wears a white lab coat and safety goggles along with a black tie, red sweater vest, and a pair of brown pants with black shoes underneath.
Personality[]
Leo is really brilliant with his intelligence. He was shown to be cowardly during his time with Professor Milo and Wade Magny with Milo's untested machine.
When he was freed from the vortex many years later by Batman, Leo expresses his gratitude to the Caped Crusader and the Gang for freeing him.
History[]
Early life[]
Leo was the son of Sam Scarlett and henchman of Professor Milo during Batman's first year. When Batman attempted to stop Milo from completing his experiment, Leo was killed by the vortex generated from the machine.
Scooby-Doo! & Batman: The Brave and the Bold[]
When Mystery Inc. arrived in Gotham City as part of the Mystery Analysts of Gotham, Batman keeps hearing Leo's voice in his head during the case of the Crimson Cloak.
After deducing the Crimson Cloak's identity as Clayface, and unmasking the Riddler posing as The Question, Riddler activated Milo's machine to destroy Gotham. After hearing Leo's voice, Batman quickly learns that Leo is still alive in the vortex. With the help of the Gang and the other Mystery Analyst members, Batman pulls Leo out of the vortex, alive and well.
As the Riddler and Clayface were taken into custody, Leo was reunited with his father, who expresses his gratitude to Batman for saving his son.