Granny
(resident of O. Saka)But I reeeeaally gotta go!!Aha!!Whaaaaaa!?Suddenly, I remembered the words that my granny had told me once before.Oh no, there's a line for the girls' toilet!The "Boy For A Day" spell!!Don't forget!!Nyouko (alias), I will teach you a magic spell for when times are troubled!! You may have noticed, but Youko is a fairly common Japanese female name. Nyouko, however, literally breaks down into "urine girl". I'm sure this pun can be rendered in English without getting excessively crass, but I can't think how at the moment. Feel free to fix this note if you figure it out before I do.