Bonnie Davis is a pre-made Sim, living in Roaring Heights with her romantic interest, Clyde Reeves. She's an aspiring author who enjoys writing about her escapades with Clyde, a lover who appears to be leading her down the wrong path under the guise of showing her a more exciting side to life.
At the start of the game, she is 20 days away from becoming an adult and has 1 skill point in Athletic and 3 skill points in Writing. She is employed in criminal career in level 2.
She is probably related to Charlie Davis, a maid from Lunar Lakes, since there are many descendants of other Sims there.
Though the family bio implies that Bonnie is well-meaning or even naïve by stating that Clyde may be leading her down the wrong path, upon closer inspection it is revealed that Bonnie has the evil trait. Whether this is because of Clyde's influence on her is up to speculation.