Saba Colbshallow wasn’t going to be a major character when I originally outlined Senta and the Steel Dragon. Most of his part was going to be another character. Originally, he was a minor character, who was there to step and fetch, son of the cook.
When I got to writing The Drache Girl, I just decided to use him rather than the character I had originally intended. That he became a police constable in that book was largely due to the fact that I was watching the British TV show Hamish MacBeth at the time.
Saba’s big parts are in book 3 and book 5, so for book 4: The Young Sorceress, he appears in his role as a moon orbiting around Senta’s planet. He almost comes to be an antagonist for her, and I struggled a bit to make sure that didn’t happen. If they had come at odds with each other too much, it would have adversely affected my plot for book 5.