Isako Toriumi

Ms. Toriumi is the home room teacher of Class 2-F in Persona 3. She is a language teacher for the junior class at Gekkoukan High School. Ms. Toriumi is a laid-back teacher who is often at odds with Mr. Ekoda. She is extremely fond of cake and she at one point tells a student that they need to bake her a cake to turn in with one of their assignments. Other teachers at Gekkoukan have mentioned they would bring her cake whenever they needed to talk with her so she'd be in a good mood. Although she loves nearly all cakes, she doesn't like Mont Blanc. Ms. Toriumi and Mrs. Terauchi occasionally play Mahjong together after work.

Terauchi is only a novice at the game and Toriumi is teaching her Mahjong terminology, something which Terauchi is very excited about. However, from her descriptions of the games, it seems Toriumi is taking advantage of her inexperience and cheating to win. Supposedly, Toriumi has never lost a match.

Ms. Toriumi is an avid player of an old MMORPG known as Innocent Sin Online. The protagonist can form a Social Link with her after he receives a copy of the game from Junpei Iori. Toriumi, using the handle Maya (a reference to Maya Amano), convinces the protagonist to use the handle Tatsuya (A reference to Tatsuya Suou). Maya and Tatsuya discuss Toriumi's grievances at work, and she eventually develops a crush on the protagonist.