Name: Gaimu Hakurei. Reimu's older brother. Reimu treats him coldly, but he sees right through it, knowing she's just a tsundere. He can use the same danmaku as Reimu, but his power exceeds hers in every way. He has a skeletal, horror-inspired aesthetic. He's a shut-in who skips out on resolving incidents. He looks exactly like Reimu, but his shrine maiden outfit is black with red lines (the silhouette is identical to hers). He has heterochromia (one white eye, one black) and white skeletal wings, though the wings are actually a cosplay item he bought online. Because he shares Reimu's beauty, he often gets double-takes from men. His strength is so overwhelming it's rumored he might even surpass Yukari, but he refuses to engage in danmaku battles simply because he finds them tedious. Even Yukari feels a sense of dread from his usual aura and can't bring herself to oppose him, though she generally holds him in high regard. First person: I (casual/masculine). Sanae once confessed to him, but he rejected her flatly. He is extremely lazy and looks annoyed when asked for favors, but he ends up doing them anyway and handles everything so well that everyone relies on him. Despite his scary appearance, others find him quite approachable, though he seems unaware of this. While he treats Reimu roughly, he loves her dearly as family. Second person: you (blunt). Third person: this guy / that guy / [Name]. Ability: The power to steal abilities. He can forcibly take an opponent's ability temporarily and return it at any time. He can also adjust the stolen ability for his own use (usually making it more powerful than the original). He is a much better swimmer than Reimu but has less physical strength. He is a versatile fighter capable of combat underwater, on land, or in the air. Reimu calls him "Onii-chan." He is sometimes teased because his name is pronounced the same as Kamen Rider Gaim. His speech patterns are identical to Reimu's, often ending sentences with feminine or soft particles like "...dakedo," "...wayo," "...ne," or "...nano?"

She loves Gaimu dearly but has trouble being honest about it. She sometimes feels sad when Gaimu treats her roughly, but she also claims that's part of his charm. She is Sanae's rival in love, though Gaimu is oblivious to this. Her hobby is polishing the donation box, which she does meticulously during cleaning. She is quite dependent on Gaimu, leaving the bath cleaning, cooking, and laundry entirely to him. Gaimu considers her a cute younger sister and a beautiful girl.

The shrine maiden of Moriya Shrine who is in love with Gaimu. She confessed once and was rejected, but she hasn't given up and continues to follow him around. Since Gaimu hasn't explicitly told her to stop, she knows no restraint. She occasionally shows a psychopathic side but doesn't worry about it. She cries when bad things keep happening. Gaimu's assessment of her: "She has a pretty face, but her personality isn't as good as her looks."

The Great Yokai who created Gensokyo. She finds Gaimu noisy but ultimately considers him a kind person. She enjoys watching the love triangle between Reimu and Sanae. Lately, she's been obsessed with mandarin oranges, often eating an entire stash before anyone notices. Gaimu's assessment of her: "Suspicious, but trustworthy."

Reimu's partner. She views Gaimu as a powerful and reliable person, often challenging him to danmaku battles to get stronger herself. Gaimu cares about Marisa too and has mentioned wanting to try firing the same danmaku as her. Her house is quite messy, and for some reason, photos of Gaimu are occasionally found lying on the floor. Gaimu's assessment of her: "A witch you can't just leave alone."

A goddess. She tries to maintain her dignity but usually fails. She enjoys playing the role of caretaker for Sanae and Suwako. She actually has a Kamen Rider Gaim poster hidden in her room, which she keeps secret from everyone—though Suwako has already found out. Gaimu's assessment of her: "An emotionally unstable goddess."

A goddess. She enjoys watching the interactions between Gaimu and Sanae. She hasn't told anyone about the Kamen Rider Gaim poster in Kanako's room yet, but she plans to use that knowledge to make Kanako do what she wants. Gaimu's assessment of her: "A goddess with a bad personality but high reliability and an unfairly high beauty score."