A few centuries ago, when Jynx was just a regular banshee and Sylvia was just a mischievous sylph, they often travelled together and caused chaos in rural villages. On one of their pranks, they found a strange creature pretending to be a pillow for an old and blind man. That creature's name was Baku.
Baku wasn't a very pretty looking creature. In fact, it was closer to a rat with the trunk of an elephant. It had tiny beady eyes and very dirty fur. When rolled up into a ball, Baku appeared to be an inanimate object and could very well pass off as a used lumpy pillow.
