He is Uncle to Valerie and Pongo Twistleton, hence 'Uncle Fred', and also has an Aunt Brenda.
A tall, slim, distinguished-looking man with a jaunty moustache who looks like a Guards officer; he retains 'the fresh, unspoiled outlook of a slightly inebriated undergraduate'. As a young man in America, before coming into the title, he had been a cowboy, a soda-jerker, a newspaper reporter and a prospector in the Mohave desert. He has also been tiger shooting in Bengal.
At school he was known as 'Barmy' Twistleton. He knew Galahad Threepwood in the old days, when they used to be thrown out of night clubs together. He once had a sheep dog called Mittens and now has a dog called George. During WW2, he served in the Home Guard.
He employs a butler, Coggs.
He went to Blandings Castle as Sir Roderick Glossop to help: Pongo, who needed money; Valerie, who'd broken up with her fiancé Horace; an honorary niece, Polly Pott, who needed her fiancé's uncle to give him money to buy an onion soup bar; and Lord Emsworth, who didn't want to give his prize pig away. Along the way he managed to foil the Efficient Baxter and perform the confidence trick on Lord Bosham. (Uncle Fred in the Springtime)
He used the name George Robinson of 14 Nasturtium Road, East Dulwich when arrested at dog races. This came back to haunt him briefly at Ashenden Manor when he was recognised by the copper who'd arrested him. At the Manor he was pretending to be Major Plank so as to help Sally Painter, the girl he thinks will suit Pongo. He also managed to help the Manor's owner, Bill Oakshott, and a housemaid. (Uncle Dynamite)
He advised his wife's half-brother Sir Raymond Bastable about his book, suggesting he get someone to pose as author. Later he helped Raymond, his godson Johnny Pearce, old friend Albert Peasemarch and even a local policeman to get together with their intended partners. (Cocktail Time)
He made a second visit to Blandings to help out Myra Schoonmaker, the daughter of an old friend from his days in America and Bill Bailey, a friend of Pongo. Naturally, this meant introducing an impostor into Blandings and protecting the Empress against the Duke of Dunstable (again). (Service with a Smile)
