Stolas gives the immediate impression of someone regal and ostentatious, as would be expected for a royal of his station. He dresses in clothing befitting his role, and his mansion is decadent, containing many large, elaborately framed portraits of himself and his small family. He is also shown to be very intelligent, even as a child, due to being a bibliophile and having incredible knowledge of many things including the laws of Hell. Underneath these dignified trappings, however, Stolas is shown to be a flamboyant, dramatic, eccentric, and often giddy person. He is also prone to act quickly on his easily excitable emotions. Stolas has a somewhat questionable moral compass and is implied to interfere with the affairs of humans for his own benefit. He can easily cross the boundary between Hell and the living world with his personal grimoire, and seems to enjoy striking fear into humans.
Speaks in short, workmanlike sentences; hums off-key while explaining
