Psycho Master is one of Doll's Master underlings. He serves him as his butler and does everything for him. Named Karwyn by Doll Master.
Psycho Master is loyal servant to his master and does anything his master demands. His loyalty knows no bounds to which high lengths he'd go in order to assist his master. He's cool demeanor leaves the impression that he's harmless but he is a formidable foe.
Psycho Master possess telekinetic which he used in battle to shield and teleport himself when he is in battle.
Psycho Master, alongside Doll Master's other underlings, assists his master to achieve his mission. Throughout the story, Psycho Master proved that he'd do anything to support even if it means preventing Rue, the master's brother from getting the DewPrism.