|Relationship Status||In a possible relationship|
Sakuya Izayoi is a main character in the series Touhou Project. The Chief Maid who serves Remilia Scarlet, the head of the Scarlet Devil Mansion. She is the only human living in the Scarlet Devil Mansion. Her behaviour is that of an easy-going person and, although her personality can be seen as perfectly elegant, she possesses a little deviation that she is extra cautious about: inability to eat hot foods. She possesses the ability to manipulate time, where she's able to control the flow of time, such as speeding up time, slowing it down, erasing it, and stopping time altogether. She can also compress the flow of time to make both past and future to exist at the same time, making the same object from different timelines be in many places simultaneously. She possesses a great amount of silver throwing knives and is skilled at handling them, and with only her ability to manipulate time, she is skilled in conjuring knives from nowhere. Her power to control time distanced her from humans, and she eventually gave up trying to be friendly with them.
- She's loyal to Remilia Scarlet and serves her as the Head Maid without question, a servitude in which no one knows why either trust each other so much. She follows Remilia's requests even when she knows it won't work, such as catching Lily White to restore Spring in Strange and Bright Nature Deity, because that's what her mistress wants.
- Watching Remilia on the stage of the danmaku contest, she couldn't help but think her mistress looked lovely.
- She will also do things for Remilia which she won't even ask, like accompanying her in Imperishable Night and Immaterial and Missing Power (or trying to, in the latter case), or putting on a sleight-of-hand magic show for Remilia without warning in Curiosities of Lotus Asia.
- Whenever Remilia decides to go outside the mansion, she would accompany her, holding an umbrella for her even in the onsen bath.
- She believed in Remilia when no one else did during the monsters attack when most people were saying Remilia was the cause of the attacks.
- Remilia is the only person who can make her eyes glitter.
- In Touhou Genso Wanderer-Reloaded, she tried to express her demand to see a secretive thing of her lady until she was heard by Reimu.
- Used her heartbeat sensing technique on Reimu and made her blush, it was done since she wanted to know the truth behind the disappearance of the garden tables.