In my urban fantasy, I have Trisha Paige, Fin and Cal, and Thyla. When I started writing my sci-fi detective series, we have Jan Sterling and the villian, Rosorio.
When I decided to write my Travel series, Rosetta's daughter, Jan, was a good addition to give her mother balance.
I included a few familiar characters in my Quest series as it is derived from the Domino Sagas. Nathan's mother, Alice, and his father, Mike Carone. I wanted to write a YA adventure and this was more interesting to write than my other series. I have conflict, frustration, and sorrow.
And who can forget our famous reporter, Olivia Crane.