Dr. Thorn

"I hate middle school dances."

- Dr. Thorn

Dr. Thorn (Ο Δρ αγκάθι in Ancient Greek) is the manticore and a prominent figure in Kronos' Army. He was a lieutenant of Kronos's Army and is vice principal of Westover Hall. He was killed by Mr. D.

The Titan's Curse
Dr. Thorn became a vice principal of Westover Hall, and he suspected two students there, Nico and Bianca di Angelo were powerful demigods. He first met Percy, Annabeth and Thalia at the entrance, and their arrival confirmed Dr Thorn's suspicion. While Percy defied Thalia's orders and followed the di Angelo's and Thorn. He found that Thorn's main weapon was that he could shoot long and deadly thorns, (hence the name Dr. Thorn).

During the dance he took Nico and Bianca away while Percy followed, Thorn ended up capturing the three to a nearby cliff to make his escape. As his escape helicopter was arriving he was ambushed by Thalia, Grover and Annabeth. He was powerful enough to hold his own against them until the Hunters arrived causing him to jump off a cliff, with Annabeth on his back. He then delivered Annabeth to the General.

Dr. Thorn was seen again by Percy when he was tailing Grover, Thalia and Zoë on their quest at the Smithsonian Air and Space Museum. He went into the natural museum to meet the General. Percy described him as being a "silly wannabe soldier" next to the General who was a born commander. He was later seen again on the docks in San Fransisco, showing contempt of the Skeletons that were supposed to be the ones to capture Percy. He battles the quest team and he nearly prevails when Mr. D kills him by wrapping him up in grape vines and then strangling him to death.