Watatsuki no Toyohime is a princess of the Lunar Capital who acts as their head of diplomatic affairs and the main antagonist of Koishi Komeiji's Heart-Throbbing Adventure. Alongside her sister Watatsuki no Yorihime, she is one of the two in charge of the "Moonlight Descent Ceremony" and the mastermind behind Gensokyo's residents being driven mad.

(Source: Toyohime KKHTA)