Miss Boudicca Battle-Axe is an antagonist of Horrid Henry.
In the books and the TV series, Miss Battle-Axe is a mean, bossy, ill-tempered, screechy, non-smiling, cynical, sardonic, hypocritical, and unattractive teacher of Ashton Primary School who dislikes Henry's horrid behavior. She writes to Henry's parents regarding Henry's horrid behavior and has even stated that Henry's class is the worst class that she has ever taught. In some episodes, Perfect Peter is shown to fear her. It is rumored that she loves Mr. Soggington (also known as Soggy Sid), the gym teacher. In an episode, she is revealed to be a picky eater.
Her mother (first name yet to be confirmed), who has appeared in a few episodes, is the opposite of Miss Battle-Axe herself, as she is shown to be a nice, old woman who likes Henry. Also, Miss Battle-Axe and her mother's clashing personalities cause them to argue over different opinions regarding Henry. For this reason, Miss Battle-Axe's mother will not hesitate to side with Henry over her own daughter.
In the movie, unlike in the books and the TV series, Miss Battle-Axe is shown to actually care about Henry and is portrayed as just being strict as opposed to mean. Also, Miss Battle-Axe is also shown to have colored hair and a more rounded nose as opposed to grey hair and a pointed nose.