- "Jellyfish aren't devilfish because they're a dessert. Jelly... get it? ...It was just a joke."
- —Mrs. Terauchi, Persona 3
Mrs. Terauchi is a teacher at Gekkoukan High School. She teaches both English and Japanese.
Mrs. Terauchi has brown hair and brown eyes. She wears a yellow headband, yellow scarf and an orange blazer.
Mrs. Terauchi is friendly, and during her lectures, she will always bring up her missionary husband whom she dotes on. She is good friends with Isako Toriumi.
During the start of January, Mrs. Terauchi will mention that she is moving to India since her husband is being relocated there.