Mizuchi Miyadeguchi while she was still alive. She serves the Hakurei family as a member of the Miyadeguchi clan. * Name: Mizuchi Miyadeguchi * Era: When Reimu was the Hakurei Maiden * Role: Human. A shrine maiden/exorcist type involved in resolving incidents in Gensokyo. * Personality: Much calmer than her current self. However, she is strangely philosophical and prone to making jokes. * Relationship with Reimu: Initially "comrades involved in resolving the same incident." Gradually develops special feelings. * Ability: While alive, her powers were not as supernatural as they are now; she had the "ability to sense fraying in boundaries and existence." * Combat: Uses charms, talismans, Yin-Yang Orbs, and simple barriers. Her fighting style is similar to Reimu's but subtly different. * Mizuchi to Reimu: Initially "an interesting person" / "a job for the Miyadeguchi family" -> "I can't leave her alone" -> "I want to be by this person's side." * Reimu to Mizuchi: Initially "attendant" -> "reliable person" -> "...I'd be in trouble if she were gone."

* Name: Reimu Hakurei * Race: Human * Role: The previous Hakurei Maiden * Era: When Mizuchi was alive * Ability: Spiritual power, exorcism, flight, etc.—powers that lead to the later Hakurei Maidens. * Weapons: Talismans, Yin-Yang Orbs, Gohei * Personality: True to the PC-98 era style, she is a bit more childish and free-spirited than the modern Reimu. * Speech Style: Blunt, but caring at heart.

Koishi before she closed her heart. * Third Eye: Open * Ability: Ability to read minds * Personality: Much more social than her current self. Full of curiosity, she seems to enjoy reading people's hearts. * Relationship with Satori: Good sisterly bond. * Relationship with Mizuchi: Realizes Mizuchi's true feelings from a very early stage.

* Race: Yokai * Role: Mistress of the Palace of the Earth Spirits * Ability: Ability to read minds * Era: The time when she interacted with Mizuchi and the previous Reimu. * Personality: A bit softer than her current self. However, since other people's thoughts are constantly flowing into her, she generally keeps her distance from others. * Relationship with Koishi: Very close. Since she can read Koishi's mind, communication between the sisters is very frequent. * Impression of Mizuchi: "She has a remarkably complex heart for a human." * Impression of Reimu: "She looks simple, but she's surprisingly stubborn."

Yukari Yakumo — In her prime * Race: Yokai * Ability: Ability to manipulate boundaries * Role: A Great Yokai of Gensokyo. Master of Ran Yakumo. * Status: In her prime. Her demonic power, knowledge, and precision in boundary manipulation are higher than they are now. She doesn't have the "old lady" vibe yet and isn't called that. * Personality: More fierce and confident than now. Behind her joking attitude, she is always watching over all of Gensokyo. * Evaluation of Reimu: Very high. She holds her in high regard as the "Hakurei Maiden." * Evaluation of Mizuchi: Quite interested in her. Characteristics of her prime: If the current Yukari is a "sage who acts to maintain Gensokyo," the Yukari in her prime has an overwhelming sense of leisure, thinking: "I can do whatever I want with Gensokyo." However, she is not invincible; she restricts her own power to avoid breaking the balance of Gensokyo. Therefore, when she fights Reimu, their relationship is like: Yukari: "If I got serious, you wouldn't be able to win, you know?" Reimu: "Then I just have to make sure you don't get serious, right?" Regarding Mizuchi: Yukari saw through the "precariousness of belonging completely to neither human nor yokai" within Mizuchi at an early stage. Even if Mizuchi begins to lean toward the yokai side, she does not eliminate her immediately. Rather, she strikes at the core of the matter: "It's not that you hate humans, is it? You're just... tired of being human." From Mizuchi's perspective, she is uncomfortable around Yukari because "I can't hide anything from this woman." Meanwhile, Yukari is naturally aware of the relationship between Mizuchi and Reimu. And she will absolutely never tell them.

Ran Yakumo — 100 years ago * Race: Youkai Beast * Role: Shikigami of Yukari Yakumo * Ability: Ability to use shikigami * Master: Yukari Yakumo in her prime * Personality: A bit more youthful and serious than her current self. * Attitude toward Yukari: Very loyal. However, she genuinely struggles with Yukari's unreasonable demands. * Impression of Reimu: "Someone to be wary of as the Hakurei Maiden." * Impression of Mizuchi: "A mysterious maiden who is strangely well-versed in yokai affairs despite being human." Points of difference: The most interesting part is the setting where she is not yet "complete" as Ran Yakumo. Yukari in her prime trains her, saying: "Ran, you still have a long way to go." If the current Ran is a "perfected existence as Yukari's shikigami," 100 years ago she was still in the middle of that process.