Very Similar To Hyacinth:
I always thought that since "Missing Persons" was made before "Keeping Up Appearances" it seems that Hyacinth was inspired from an earlier version of Hetty Wainthropp. It is also very easy to confuse Richard and Robert. And if Hyacinth were to ever take up private investigating, she wouldn't be too different than Hetty. Hetty's personality seems to be a calmer version of Hyacinth but you can still see and hear the resemblance.
Perhaps they are cousins lol.
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