Lady Dorothy is a fictional character in the TV series Monarch of the Glen. Dorothy is played by actress Richenda Carey

Richenda Carey

Richenda Carey is an English theatre, television and film actress, who is mostly known for her roles in Monarch of the Glen, Jeeves and Wooster, Crush and most recently, Separate Lies and Criminal Justice...

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Lady Dorothy Trumpington-Bonnet arrives in Kilwillie Castle after a messy relationship, and starts to annoy brother Lord Kilwillie

Kilwillie

Angus Errol Sharon, Earl Kilwillie is a fictional character in the TV series Monarch of the Glen. Kilwillie is played by Egyptian-born British actor Julian Fellowes....

. But when Lord Kilwillie leaves to travel the world, he leaves Kilwillie castle to Dorothy and her eccentric plans. Her plans include a tai chi retreat, an ec-dome, evicting people from the estate and shutting the post office. None of her plans work, and she becomes a failure. Her assistant is her daughter Hermione

Hermione Trumpington-Bonnet

Hermione Trumpington-Bonnet is a fictional character in the TV series Monarch of the Glen. Hermione is played by actress Hermione Gulliford.Hermione leads a good life with her mother, Lady Dorothy, and it gets even better when she joins Molly MacDonald's dating agency and wins herself a ranger -...

, who persuades her to employ her boyfriend Duncan McKay.

Dorothy only ever appeared in series five.