Bunmi, a minor character in My Sister, the Serial Killer, adds a touch of humor with her constant napping at the hospital—hardly a place for rest, yet she sleeps through it all. This highlights her detachment from the high-pressure environment around her, making her a bit of a comic figure in contrast to the seriousness of her workplace.

Then there's Mrs. Rotinu, the patient who takes up an entire sofa just for herself and her handbags. This behavior seems to subtly comment on how society views body size without directly saying “fat.” Oyinkan Braithwaite might be avoiding that word on purpose, choosing instead to show the character’s physical space. It feels like a clever way of sidestepping a loaded term while still addressing the underlying issue of body image.

The way readers react is also telling. People might cringe at the word fat but are drawn to the more grisly aspects of the story. This contrast speaks to the odd ways human psychology works—how we're repelled by certain words, yet eagerly consume violence in fiction.

In the end, Braithwaite uses humor and subtle details to keep readers engaged while also prompting deeper thought about cultural and psychological dynamics. The mix of lighthearted moments with darker ones reveals a lot about human nature and societal contradictions.