An Imaginary Friend of mine was myself actually. I envisioned a copy of me with a slight difference in skin color so I could tell us apart XD His was darker. We always had deep and insightful conversations. He had a pretty serious tone and was mostly recitazione as the Wise Mentor whenever I had the need to talk about an issue of mine. It was helping a lot.
When I was even younger, I also used to envision little creatures above my shoulders kinda like the tiny Angel-Devil concept. The difference was that the Angel was a Blastoise (It used to be one of my preferito Pokemons back then) while the Devil looked più like an older version of Casper the Friendly Ghost. I don't remember much of what we were doing all together but it was fun, I guess.
I had so fucking many. Like I literally made a wholeass notebook dedicated to all of them and their society and what their house was like. Think of Fosters home For Imaginary Friends (but I had this idea when I was 4 o 5, before that even came out).
The three I recall most vividly are, Maggie, Pain, and Cleo.
Cleo was an Egyptian. I had a wicked Egypt phase and so I (being really little) imagined this very stereotypical ancient Egyptian girl and we would explore pyramids together. My sister sometimes joined us.
Maggie was a magician. She wore a arcobaleno dress and had thick curly black hair. She was a ghost and could be evil o good depending on the context of the game, but mostly she was evil. I remember drawing her a haunted house and she had bloody knives and sometimes she had blood on her dress. But I liked her and thought that she was friendly because she didn't kill o hurt me. Just other imaginary friends...
And Pain I think was my way of conceptualizing and coping with death and suffering. I remember that every time an ambulanza passed da my sister o myself would remake, "oh no, Pain is hurt again."
Looking back on it, two of the three main ones were very dark. I did have this one named Ameica who was a Britney Spears like pop stella, star and her rival Kelly K because I was still hugely into Musica then.
And I also like to imagine that my preferito characters (Zack and Wheezy from Dragon Tales, at the time) would talk to me too.
Imaginary Friends were a very huge part of my childhood, especially at recess because I kept moving around a lot so I couldn't really keep any Friends and when I finally stopped moving o getting transferred to newly built schools closer to my home, I just so happened to pick Friends that moved away. Basically I didn't have too many Friends as a kid and often played alone at recess.