Hyacinth’s endeavours to impress make the lives of those around her difficult through her continual efforts to appear of a ‘certain type of people’ i.e. higher class and exclusive leading to hilarious escapades, often, through her overbearing nature, forcing those she wishes to impress to come to her candlelight suppers, and having disastrous, yet humorous, consequences to all parties when she is executing her plans. Although Hyacinth is not deterred by the latter, everyone else is afraid of her to the point that some people, notably the postman, flee when she appears. The one who suffers the most, obviously, is her husband Richard (Clive Swift). He initially worked for the council but, at the beginning of series 3, reluctantly accepts early retirement. Although he loves her with a long-suffering endurance, he is notably exasperated by her plans and her habit of spending. Although she lives to impress others, Hyacinth regularly competes with the upper-middle-class people whom she considers snobbish show-offs, such as Sonia Barker-Finch, Delia Wheelwright and Lydia Hawksworth (although Lydia Hawksworth does appear to be snobbish, as she disdains kiwifruit as “lower middle class”.) Hyacinth sometimes says things like “I haven’t a snobbish bone in my body” or “I can’t abide such snobbery like that” when talking about those she considers her competition.
Always hindering Hyacinth’s best efforts to impress – and providing an unwelcome reminder of her less-than-refined roots – are her underclass sisters Daisy (Judy Cornwell) and Rose (Shirley Stelfox in series 1; Mary Millar thereafter), and Daisy’s proudly “bone-idle” husband Onslow (Geoffrey Hughes). They, along with Hyacinth’s senile father, frequently turn up inconveniently (usually in their clapped out Ford Cortina Mk IV – which always makes a characteristic backfire when it pulls up), with Hyacinth going to great lengths to avoid them (saying “Richard, you know I love my family, but that’s no reason why I should have to acknowledge them in broad daylight!”). Hyacinth’s senile father frequently has flashbacks to the Second World War, and often exhibits bizarre behaviour, sometimes involving embarrassing situations with women (Onslow describes him as “barmy”). Two relatives Hyacinth is not ashamed of are her wealthy sister Violet (Anna Dawson) and her unseen son Sheridan. Violet frequently telephones Hyacinth for advice, allowing her to loudly announce to anyone in earshot, “It’s my sister Violet – the one with a Mercedes, swimming pool, sauna and room for a pony”. However, Violet’s social acceptability is damaged by the eccentric behaviour of her transvestite, equestrian-loving husband Bruce, whom she violently attacks because of his behaviour. Hyacinth also tries to impress people with the intellectual prowess of her beloved Sheridan (who actually only takes courses in needlework at a polytechnic). Hyacinth boasts about the “psychic” closeness of their relationship and how often he writes to her and phones her, although he never writes to her and usually phone calls her only to ask for money (much to the despair of Richard). Hyacinth is blissfully oblivious of the seemingly obvious hints that Sheridan, who lives with a man named Tarquin (who makes his own curtains, wears silk pyjamas, and has won prizes for embroidery), is homosexual. It is at one point implied that Sheridan has come out to his father.
Hyacinth’s neighbour Elizabeth Warden (Josephine Tewson) is frequently invited round to the Buckets for coffee. Ordinarily calm, Liz’s nerves go to pieces in Hyacinth’s house, causing her to smash Hyacinth’s china and spill coffee and biscuits on Hyacinth’s Burmese rug. She is married, but her husband works abroad and, like Sheridan, never appears. Liz’s brother Emmet moves in with her at the beginning of series 2 after a messy divorce. Hyacinth, upon learning that Emmet is a musician, frequently and abruptly sings out-of-key at him in an attempt to get a part in one of his productions, making him terrified of leaving the house, lest she see him (“She’ll sing at me!”). Emmet’s problems are further complicated by Hyacinth’s mistaken belief that his frightened reactions indicate that he is infatuated with her, which in fact could not be further from the truth.
Hyacinth frequently confronts the postman with complaints, such as having to receive mail bearing second class stamps, harassing him to the point that he will go to extreme lengths not to face her; and she often forces workmen and other visitors to her home to remove their shoes before entering. Michael, the vicar of the local church (Jeremy Gittins) is also loath to face the overbearing Hyacinth, whom he refers to (behind her back) as “the Bucket woman.” The vicar and his wife sometimes exact comic revenge on Hyacinth for her snobbishness; on one occasion, when she was one of a group of volunteer helpers at the church, the vicar’s wife saw to it that Hyacinth’s hand went up prematurely and assigned her the job of cleaning the church toilets.