Cartael
Cartael: A demon whose name and seal appear in the book known as the Ars Theurgia. Cartael is said to serve in the hierarchy of the north, and his immediate superior is the demon-king Baruchas.
Cartael himself holds the rank of duke and commands thousands of lesser spirits. He will only appear during hours and minutes that fall in the fourteenth portion of the day, when the day has been divided into fifteen parts.
SOURCE:
The Dictionary of Demons written by Michelle Belanger