When we first started talking about doing Tistow years and years ago, she was meant to be the main character over Jack and Loksley (Bowline Runners). She was going to learn the ropes from the aforementioned two and a bunch of urchins and the main focus of the story was just that.
But we didn't want to go too Twist with the story so she got put on the shelf for a bit. Her role remains the same after all this time though. She's still an urchin and heavily influenced by Loksley and Jack.
We're still trying to work out how exactly we want her to look so her design might end up changing.