An analogous creature to these beings in another mythos was called the vele, and a story tells of how Prince Marko captured a leader of these beings named Nadanojla by having 
An analogous creature to these beings in another mythos was called the vele, and a story tells of how Prince Marko captured a leader of these beings named Nadanojla by having his falcon steal that leader's headdress. These creatures were described as either ugly or beautiful depending on whether tales of them came from the north or the south, and they were sometimes subservient to a chief who took the form of a fat, jolly green man. According to one legend, these beings could survive outside their natural environment so long as they kept possession of a comb, and these beings were celebrated during the Radunitsa feast. One story about these beings tells of how a young seal hunter named Ivan Savelyevich encountered one while playing his balalaika and fell in love with her, but eventually left her by crossing himself. Most encounters with these beings would end poorly for the man, as they would typically end up making him dance to death or drowning him. For ten points, identify these analogues of the Ondine and the Lorelei, water sprites of Slavic myth.
An analogous creature to these beings in another mythos was called the vele, and a story tells of how Prince Marko captured a leader of these beings named Nadanojla by having his falcon steal that leader's headdress.
russalka