Sarah Fieldmen is a female anthropomorphic shiba inu in her late 20s who teaches math, English, and health (at times). She takes a fun, fair but firm approach to her subjects. She can take a joke, but knows when to put her foot down on her students' tomfoolery. She is often regarded as one of the more popular teachers in her school.

Her job can be complicated by her other occupation, a gestational surrogate mother. Causing her class to be distracted by her constantly gravid figure.