|Relationship Status||In a relationship|
Marika Shirai is the protagonist of the yuri visual novel Haitoku Sensation and the side character of the yuri visual novel Yurinate! An experienced math teacher, starting to feel a bit unsatisfied when she meets the new hire, Hana, a pervert teacher always on the edge of crossing over the cool line, she have cyan-colored eyes.
- In Yurinate she jokingly figured that Haru was distracted by her cute face and beautiful lips.
- Just by noticing Haru and Yuki was exchanging notes during class right after her playful figure she assumed that they were flirting, and asked Haru to save her flitting for during the break, to keep their flitting in check she would make them flirt in front of her so she knows nothing funny's going on.
- In Haitoku Sensation she is defined as a couple with Hana Nishikigi of a sensual relationship senpai and kouhai teachers, she also had a lovemaking with Hana in a public place, stripping her under part of clothes that gradually feels cool in one of the classrooms one evening.