I'll put all the characters names in this post, according to the characters section of the official site:
http://hyakka-ryoran.net/chara.php
The protagonist is a male.
Yagyuu Muneakira ♂
The protagonist (the main hero of the story).
Yagyuu Juubee ♀ (mentioned in the japanese wiki as: Yagyuu Juubee Mitsuyoshi)
The mystery bishoujo that fell nude from the sky.
Sanada Yukimura ♀
Sen Hime ♀
Hattori Hanzou ♀ (mentioned in the japanese wiki as: Hattori Hanzou Yoshinari)
Gotou Matabee ♀
Sharuru do Darutanian ♀
Naoe Kanetsugu ♀
Retsudou Yoshino (Her true name is:
Yagyuu Gisen) ♀
A mysterious girl that moved into the same class as Yagyuu Muneakira.
Tokugawa Yoshihiko ♂
