ペトラ・グリューン

“Sis! Sis, it’s me! Long time no see, Sis! It’s Petra!”

An underclassman hailing from Maja’s native hometown. Thinks the world of her “big sister,” preferring to stick by her side at all times.

Aptly described as a rowdy, excitable puppy, even by those who know her. Gritty, chatty, chronically unshy, and an unapologetic icebreaker—all probably thanks to a wilder childhood than most.

A year younger than Seiji, she apparently left the old country for Japan to track down Maja, but why...?