Rusalka is a variegated colourway with a grey base, dark teal streaks and teal and dark yellow speckles.

In Slavic folklore, the rusalka (plural: rusalki; rusalky) is a female entity, often malicious toward mankind and frequently associated with water. It has counterparts in other parts of Europe, such as the French Melusine and the Germanic Nixie. They may originally stem from Slavic paganism, where they may have been seen as benevolent spirits. 

It is accounted by most stories that the soul of a young woman who had died in or near a river or a lake would come back to haunt that waterway. This undead rusalka is not invariably malevolent, and would be allowed to die in peace if her death is avenged. Her main purpose is, however, to lure young men, seduced by either her looks or her voice, into the depths of said waterways where she would entangle their feet with her long hair and submerge them. She would then wait until the victim had drowned, or, on some occasions, tickle them to death, as she laughed. 

In most beliefs rusalki always have loose hair, which can be linked to Slavic traditions of unwedded maidens having unbraided or loosely braided hair which, once married, is tightly braided and worn under a headdress. Rusalka's hair can be fair, black, greenish or completely green. To "Walks like a rusalka" is an expression describing girls with unkempt hair.

In Poland, Czech Republic, and Slovakia, water rusalki/rusalky were younger and fair-haired, while the forest ones looked more mature and had black hair – but in both cases, if someone looked up close, their hair turned green, and the faces became distorted. They killed their victims by tickling them to death or forcing them to participate in a frenzied dance.