「紫と幽々子には触れさせないが、私のことは好きにしろ」と妖夢さんにしれっとネチョらせてあげちゃう人だと。

真面目に庭の手入れを続けていた妖夢さんを眺めていたので好感を持っていたり。

"You can't even have a touch with Yukari and Yuyuko , so just do what you want to me(instead)" says Saigyou Ayakashi, and nonchalantly lets Youmu have sex with her

She has long been watching how Youmu does the gardening with effort and care, so she does have some crush on her.