Rena is a Bakeneko sorceress, that normally conceals her cat features using magic. She can also shapeshift back into her original feline form..but her twin tails will still give away her yokai status.
A Bakeneko is a kind of Yokai that is the result of a cat growing very old, a certain size, or it's tail growing too long( at which time it forks)...at which time it gains many powers, including the power to shapeshift in a humanlike form. Most stories about them are sinister, but there have been many good hearted Bakenekos. Rena, may just be mearly naughty...but will help people that have good intentions. She enjoys learning new magic, and gathering magic items and books...and shiny things...and string.