The maia is a playable race specific to Slash'EM Extended. They can be any role and alignment, and they start with uncurable teleportitis and no way to acquire teleport control. Their maximum stats are as follows:
Maian characters will randomly teleport around a lot; see the teleportitis article on ways to deal with it. Using rings of teleport control or eating tengu won't do anything though. The possibility of eating nymphs and leprechauns without risks may actually be viewed as an advantage.
A Maia should refrain from eating humans, as that is considered cannibalism.