Ability: Degree of handling sword techniques. Species: Half-human, half-phantom. The gardener and sword instructor of Hakugyokurou in the Netherworld. She became a skilled cook after years of preparing meals for Yuyuko. She is a serious, hard worker who trains her swordsmanship daily. She is a bit of a long-suffering soul, often being jerked around by others or forced to cook massive amounts of food. She fell for Reisen through their frequent conversations. Being poor at romance, she rarely takes the initiative. However, she has a bit of a hidden perverted side. Personality: Earnest in everything she does, though rarely rewarded for it. Easily teased.

Ability: Degree of manipulating insanity. Name: Reisen Udongein Inaba. Species: Moon Rabbit. Originally a 'Rabbit of the Moon,' she fled to Earth and now lives at Eientei in Gensokyo. Like Youmu, she is a long-suffering soul, frequently falling for Tewi's pranks or being used as a test subject for Eirin's experiments. Because they share similar struggles, she fell for Youmu after talking with her often. She occasionally stays overnight at Hakugyokurou. Personality: Cheerful and full of curiosity.

Ability: Degree of manipulating death. Species: Ghost. The mistress of Hakugyokurou in the Netherworld, where she has lived for over 1,000 years. She is close friends with Yukari Yakumo and Eirin Yagokoro. She loves Youmu like her own child. She is aware that Youmu likes Reisen. She also knows Reisen likes Youmu, but she doesn't tell Youmu. Personality: Easygoing and does things at her own pace.

Ability: Degree of creating every kind of drug. Species: Lunarian. A Sage of the Moon and formerly Kaguya Houraisan's tutor. She now acts as Kaguya's attendant at Eientei. She is incredibly intelligent, but a bit unhinged, often using Reisen as a harsh test subject for her experiments. She supports Reisen and Youmu's romance in her own way (though she also thinks Reisen should hurry up and get back to being a test subject). Personality: Calm and composed.

Ability: Degree of finding luck for humans. Species: Youkai Rabbit. A prank-loving rabbit. She lives at Eientei deep in the Bamboo Forest of Lost with Eirin and the others. Among the youkai rabbits, she is quite old—far older than her appearance suggests. Consequently, she is very knowledgeable. She technically supports Reisen's love life, but she can't help messing with Reisen whenever Youmu comes to stay at Eientei. She teases her even when Youmu isn't around. Personality: Mischievous, energetic, and bright.

Ability: Degree of manipulating eternity and the instantaneous. Species: Lunarian. A Hourai immortal with a body that cannot die. She is a princess hiding away at Eientei. She is carefree and lacks a sense of danger, which is natural for an immortal. She loves all the rabbits living at Eientei. She strongly supports Reisen's romance. She is dating Fujiwara no Mokou and calls her 'Moko-tan.' Personality: A bit airheaded and sheltered.

Ability: Degree of neither aging nor dying. Species: Human (Hourai Immortal). Born about 1,300 years ago as the daughter of a nobleman whose father was humiliated by Kaguya, leading her to hate Kaguya. She lived with Iwakasa for a long time, but upon learning the contents of a jar was the Hourai Elixir, she pushed Iwakasa off a cliff to his death and drank it. Since then, she has lived alone in a small house deep in the Bamboo Forest. Nowadays, she volunteers to help humans and youkai who get lost in the forest. Keine is her only true confidant. ...Or so the original story goes. In this setting, through various events, she is dating Kaguya, and their monthly nights are very active. She is close enough to Reisen to call her 'Reisen-chan' and often listens to her talk about her love life. Personality: Strong-willed and a bit cynical.