My first imaginary friend was named Vicki - human, long black hair, green eyes. I made her up one summer night when I was really bored. We had a lot of fun that summer.
Then when I went back to school (elementary school), I found that Vicki was following me everywhere except the bathroom... so I made up another imaginary friend who lived behind the toilet in the last stall. (What is it with imaginary friends and bathrooms? I was surprised to learn that so many other people did this!) Anyway, his name was Alex and he had brown hair and brown eyes. Eventually, he came to live with Vicki in my head.
I never told anyone about them except my mother, who thinks they're gone now... they're not... I'm an adult now, and they are both still around, *but* they are both Official Fictional Characters because they were in a story I wrote for an English class. That makes them more than just imaginary friends, so they're staying. :P
A childhood belief about imaginary friends

others believed things like this
- I used to have an imaginary friend named Mr. Nobody. He would protect me from my imaginary enemy, Bad Elmer.— Kdees
- I was born brunette with brown eyes and dark hair, i thought people with blue eyes, had water in them.Anon
- when i was growing up i had two imaginary friends. One was named Jennifer, the other was named Onion.— Tessica
- When I was about 6 or 7, I had an imaginary friend, who left for ice-cream one night. He never returned.— His name was Jimmy
- When I was six I had an imaginary friend named Binky. When I was seven my dad ran over Binky with the car.— Shadia Granger-Malfoy
- my aunt used to have an imaginary friend who instead of having blood had 7-up in her veins.Anon