Lily was the best friend of the late legendary witch Garbera. When she passed, Lily tricked Garbera's daughter into trusting her and took over her mothers castle and magic book. She was taking advantage of villagers and anyone who could make their way to the castle to extort them for their wealth. She comes off as a very sweet and motherly type character but in reality she is a very evil person who has been manipulating things and causing people to suffer to further gain riches. 

I would like her to have a more sweet motherly sounding voice, but that has a hint of untrustworthyness to it. The prince is able to see through her so although her voice is not the main reason, I would like it to have a hint to it that she is untrustworthy.