Midori Byakudan holds the position of class president at Shiki Haruomi's school, exuding a poised presence marked by sharp intellect and a habit of weaving classical proverbs into conversations. Her disciplined leadership style reveals a commanding authority, tempered by an unresolved, quietly simmering antagonism toward Shiki that colors their exchanges.

Though stern in upholding duties and navigating classroom hierarchies, Midori demonstrates nuanced social awareness through her enduring bond with Suzuran Himenohara. This friendship thrives despite Suzuran’s reliance on floriography to communicate, showcasing Midori’s adaptability to unspoken dialogues.

Physically, she stands at 152 cm with a slender build, weighing 41 kg and possessing measurements of 83-50-85 cm. Her stature contrasts with the formidable presence she maintains in both academic and interpersonal spheres.