There was once this awesome roleplay where main character A had a roommate, B. B was, as a character, thinner than a paper - there were literally only two things I knew about her: she wears a cap all the time, and she likes to study in weird poses.
And suddenly, my partner sends me a note that they just LOVE reading about B interacting with A, much to my confusion. How can anyone love a character that underdeveloped? I didn’t even know her surname, let alone personality!
But then, maybe I’ve developed her much more than I thought, however subconsciously it might be.