Troglodytes are cave-dwelling reptilian humanoids who enjoy eating lizards and other small reptiles. Their natural enemies are the Tauri Sylvestres. The Troglodyte language is a combination of screeches, clicks and English.
Nico di Angelo, Will Solace and Apollo enlist the help of the troglodytes against Nero. In the Battle of Nero's Tower, the troglodytes disarm Nero's deadly gas, preventing him from massacring everyone. After Nero's death, Apollo notices them discussing the split of the spoils of war with Sherman Yang. Apollo suspects that Camp Half-Blood is about to be flush with Greek Fire and Imperial gold weapons while the trogs will have a fabulous new selection of haberdashery and whatever lizards and rocks they can find.
Two weeks later, Nico reveals to Apollo that he believes that his friend Bob the Titan has been calling out to him for help from Tartarus. Nico and Will intend to travel to Tartarus and try to find out what happened to Bob, rescuing him if possible. As Hades has forbidden anyone from ever going into Tartarus again, Nico intends to enlist the help of the troglodytes who can dig to and from anywhere, even Tartarus and can thus get Nico and Will in and out safely.
- Superhuman Speed: Troglodytes are extremely fast runners.
- Stealth: Troglodytes are stealthy, being able to sneak up on others undetected and take them out without realizing it
- Enhanced Digging: Troglodytes can burrow through the hardest of materials. According to Nico di Angelo, they are capable of digging to and from anywhere, including Tartarus.
- Their eyes are very sensitive to light, causing them wear special goggles whenever they go above ground.