Pigeonholing is popular in Cozy Mysteries.
It shouldn’t be.
The suspect pool is, by necessity, swarming with supporting characters. Shoving these players into tiny, readily identifiable, readily expected categories is easy to do…
The spinster aunt hiding a lurid past.
The miserly uncle sitting on a fortune.
The spurned lover.
The bitter ex.
Don’t fall into this trap. It sells you, your characters and your readers short.
Bottom line: Be imaginative. It’s what you do.