Yup, not a good idea. Although the -chan is a very good idea. Little children call older girls that they've never met before, also onee-chan. (Remember the first new episode, with that cute girl calling Keiichi 'onii-chan', which means big brother?)
Then again, Belldandy's character and Kikuko-san's voice both have that motherly, caring touch which makes the term 'onee-chan' very good for them.
30-Aug-2005