Bahaatahvlaa is as brutal and uncaring as they come from the Ninth Circle. An enforcer spirit that delights in simplifying his life into a set of rules and then removing anything that doesn't fit. He doesn't care too much about the specific rules as long as it gives him an excuse to behave violently toward mortals. This lets his brother Atishkva easily persuade Bahaatahvlaa to carry out his various schemes as they both get to indulge in cruelty.
~ excerpt from Master Librarian Mielikki's demonology lectures.