Kathie

First off
This is an OC, any similarities between her and any other character is a coincidence

Before Sodor
Kathie was built for shunting, while she was being built she took a keen interest in the works, asking every question possible. Once finished she almost refused to do any other job than work at the engines works. So she became a works engine. Looking up to Marklin until she noticed something that bugged her, he was an engine of habit. Almost everything he taught her was things he did repeatedly, something she hated, so she managed to convince her controller at the time to scrap him, he agreed. After Marklin was gone she felt lonely but she continued on with her work until one day she was told she was going to be scraped, that she had been working there so long they couldn't handle her any more. So to the scrap yard she went. But on her journey she was bought by a kind man looking for a works engine who could handle working with two older male engines in need of guidance (guidance as in emotional and social).

On Sodor
Kathie now works happily with Victor, Kevin, and Marklin. Unlike in the past she now finds the quirks of her partners fascinating and wouldn't want them any other way. She helps around the steamworks and provides help to Marklin and Victor mentally and socially, aside from being there fellow works engine. Her now kind ways and friendly attitude makes her seem lady like, which is the complete opposite of her, but none the less she's seen as a proper lady among the engines, earning a 'Miss and Ma'am' from the other engines.

Persona
Kathie is kind and friendly, tho can be rather moody. She only wants the best for her fellow engines and can be a bit bossy. She's a tomboy at heart and would rather hear about what part goes where on a ford galaxy than about what flowers go best with the colour green. she's rather ambitious and eager to be the best she can.

Romance
Back in the day she will admit to having feelings back for Marklin but now a day's could care less. Shes doesn't have any preferences and limits herself to friendship. Tho sometimes they're are a hint of feelings towards Marklin, making the two highly awkward.