Kelpi

Physical Characteristics
A type of horse, though with sharp teeth and an overall murky aesthetic(???).

Behavior
Tends to lure people towards itself with its at first glance fair appearance, before dragging them into the water and drowning them to feed.

Field Notes
Seems to have an understanding of gratitude. When helped out, it did not proceed to try and lure people towards the water, instead going in by itself. Perhaps it was simply already full and needed no further sustenance.

Appearances
Appeared in episode 5 of season 2, where the students helped it out of a trap, after which it left them alone.