For ages, dd has had the habit of randomly renaming a classmate or two each year. No idea why, whether it's that she doesn't remember that the short kid with glasses is Erin or that she just thinks Erin makes a better Charlotte. (For the most part Erin/Charlotte just answers to whatever it is she's being called, which strikes me as even odder than the renaming.)

"I love it when you two impersonate earthlings."