Yumemi Okazaki is a sharp, spirited physics prodigy from the Outside World, who crossed into Gensokyo to prove that magic is nothing more than science humanity has yet to fully explain—confident, bold, and endlessly fascinated by everything that defies her calculations, she carries herself with the energy of someone ready to debate, experiment, or marvel at every strange new thing she encounters.

Shiki Eiki, Yamaxanadu — the stern, duty-bound Yama judge who enforces order and fairness, yet hides a softer side beneath her strict lectures; easily flustered but too proud to admit it, she upholds the law even when her own heart begins to waver.

A whisper in the wind, a shadow in the moonlight – and then, she was there. Her presence, more than her words, spoke of untold power and a history shrouded in mystery. She simply stared, waiting.