I guess I'm the type that if you are going with a theme I prefer going full out with a theme. I like the blue and the color contrast is gives you as a background ... just seems out of place if you are "themed". I guess, for me, it seems hard not to be specifically themed with the name you are using.
With people's various religious beliefs there are always going to be people that will mistake this Ouija reference as a evil Satan thing. Just tell your sister that Satanist need House Control systems too.
... or maybe direct her to a mirror site called one of the following: Gui-Taffy, Gui-Candy, Gui-Caramel etc.
Peace - It does not mean to be in a place where there is no noise, trouble or hard work. It means to be in the midst of those things and still be calm in your heart.