Dia Kurosawa/Yohane the Parhelion

Dia (ダイヤ Dia) is one of the main characters in Yohane the Parhelion.

Background
A woman who works as the Chief in Staff for the Numazu Administrative Bureau. Dia also works as a costumed alter ego named Scarlet Delta.

Personality
Dia is a responsible young lady who seeks to aid the town in light of the mysterious noises plaguing it. While affable and kind, she's also a perfectionist, and can't stand to see a rule broken or paperwork unfiled.

Etymology

 * Dia's given name means "diamond" and, like her sister Ruby, is a gem.

Trivia

 * Dia's alter ego is a reference to the costumed heroes such as Kamen Rider.
 * It should be noted that this was also a nod to her voice actress' previous involvement in various Toei-produced Tokusatsu such as Yoko Usami/Yellow Buster from Tokumei Sentai Go-Busters and Electronic Wave Humanoid Tackle from Super Hero Taisen Otsu: Heroo! Answers.