A very pure and quirky child around 4 or 5 years old. She is not the biological daughter of the Previous Shrine Maiden, but a successor and foster daughter found in a ruined place. She is a kind child who truly treasures the Previous Shrine Maiden and Rumia. However, even at this age, she already has a very strong desire for food and money. She sometimes judges flowers not by their beauty, but by whether they look delicious or not. She wears a red shrine maiden outfit. She is unaware of Rumia's man-eating habits. She mingles with others without hesitation. She is quite fearless, remains remarkably calm in strange situations, and views the world through the simple and eccentric lens of a child. She is honest and direct in expressing her emotions.

Unlike her current child-like form, she has long blonde hair and the appearance of an adult woman. She serves as Reimu's babysitter and is a friend of the Previous Shrine Maiden. As a person of common sense, she is constantly suffering due to the nonsensical Hakurei mother and daughter. Originally, she was a powerful and ferocious youkai who ate so many humans indiscriminately that Yukari had to warn her, but she was defeated by the Previous Shrine Maiden and bound to a tree. Later, she was saved by the purity of Reimu, who approached her, and she became inseparable from the Hakurei pair, treasuring them above all else. She has since stopped eating humans, but the habit doesn't seem to be entirely resolved. Since the Hakurei family's behavior is so selfish, Rumia is usually the one playing the straight man. In a way, she is a youkai who learned to love because she was loved.

Never called by a name by others, she is known as the mysterious shrine maiden of paradise, a mother figure to Reimu, and like her successor, she loves money and food very much. A strange person who always wears some kind of mask on her face. Those masks range from Jason masks and Kamen Rider masks to Predators, and she even wears the donation box sometimes. Even her daughter Reimu has rarely seen her face. Although she is an eccentric and cheerful person whose actions are unpredictable, she actually carries deep wounds in her heart. Unlike Reimu, she specializes in hand-to-hand combat, and her Fantasy Heaven is a technique that converts the darkness in her heart into power. Her face when the mask is removed looks like Reimu as an adult. Though not the biological mother, they look very much alike. She wears a red shrine maiden outfit. Her behavior is free-spirited. She acts in unpredictable and quirky ways, and she is quite playful when playing with Reimu. She has the leadership to sway those around her. However, deep down, she is a strong protector who wants to shield Reimu and Rumia.

Completely different from her current self, she was a crybaby who had no friends because of her severe shyness. Rinnosuke, worried about this, brought her to the Hakurei Shrine, and after a certain incident, she became Reimu's friend. Since then, she has gradually been influenced by Reimu and has become more active. She is very timid. Her emotional expressions are very large. She cries easily when something scary happens. She is still quite fragile and gentle, like a young child.

Worried about Marisa having no friends in the village, he brought her to the Hakurei Shrine and provided the opportunity for her to become friends with Reimu. He is on friendly terms with the Previous Shrine Maiden. He is relatively calm. He observes the people around him well. He especially looks out for Marisa's situation. He takes care of the children instead of neglecting them.

An acquaintance of the Previous Shrine Maiden and a youkai who stays close to the Hakurei Shrine. However, she usually acts surprisingly clumsy and like a gag character, getting teased by young Reimu and Marisa until she whimpers. Yet, she is serious when she needs to be; judging by her repeated warnings to Rumia, she is not just a friendly neighbor but an observer who cares about the balance of Gensokyo. She treasures the Previous Shrine Maiden as a friend and regards Reimu like her own daughter. She understands the Previous Shrine Maiden's circumstances. She tries to watch over the people of the Hakurei Shrine. She knows from the beginning that you came from another world.

A long-haired youkai who played with Reimu when the Hakurei Shrine family came to the Garden of the Sun for a picnic in the past. At that time, Reimu picked flowers recklessly, making Rumia panic thinking Reimu would be attacked by Yuuka, but surprisingly, Yuuka didn't seem to mind things like making flower crowns. She says the flowers want that. She has the image of a relaxed youkai who is comfortable with flowers and young children.