oh yeah, like, everyone i know has characters wandering around without stories. sometimes its because they gave up on the story but kept the characters, sometimes theyre created for RP, and a lot of the time theyre just created, like yours.
i tend to create my characters for their stories, or otherwise a story will be born from their creation. but a lot of them fall through, and im left with the character (the ones i really like, anyway) and ill recycle them when the time is right.
for example, i have a whole host of abandoned characters from my old webcomic that i cancelled - i still like some of them, and will probably use them as side characters in later projects.