Shizuku is a Mizuchi, a water dragon deity, who bears a grudge against Demon Slayers ever since the demise of her clan by the Jibashiri Family. She initially planned to kill Yuto Amakawa before he would awaken as a Demon Slayer, but after witnessing his kindness during her fight with Himari and hearing the reason why he refuses to kill Ayakashi, she decided to try to live amongst humans as a live-in housekeeper and an observer. She fills the Lolicon niche.