¡Spoiler warning for all the books!

Murder Most Unladylike - Miss Tennyson

Eh, idk, she was OK, but idk what to feel about her since she helped Miss Griffin, but was guilty about doing so-

First Class Murder - Madame Malinda

I don't really like her, but I don't hate her as much as I hate Mr. Daunt.

A Spoonful of Murder - Hazel's Mum (I forgot her name-) & the Lift Operator

Hazels mum - Kind of liked her, but now have very mixed feelings about her, even if she didn't murder anyone / order for anyone to be murdered, technically.
Lift Operator dude - Idk since idk much about him

Top Marks for Murder - Mr. Thompson-Bates

Ik he didn't really murder anyone, and ik he wasn't working together with Mrs. Thompson-Bates, but yeah-
I don't like him either.