Lore drop about my mallard and a few trigger warnings:
He was the first one of the gresleys to get married and have a child
He's a jerk and much worse than his brother Spencer(who's a bit nicer than him), always obsessed with the title of the "Fastest engine in the world"
He would often hurt his wife Alice(my oc) for no reason, it had gotten so bad he ended up killing her, when she yelled at him, wanted to get a divorce and take full custody of their son Mico who was five at the time and didn't know his own father killed his mother, he still visits his mother's grave to give her, her favorite flowers (which are iris)
Alice's spirit never rests after her death, and decided to hunt mallard down after what he did to her thanks to Lady (who didn't know any of this because Alice just told her, she wanted to see her son and visit the island)
(this has been on my mind for a while, and you can ask me more about it if you like)