You is a well-built, fair-skinned young male with red hair often tied back into a loose ponytail, and purple eyes.
You is known to others as someone who puts women above men, the "enemy of men". With this, he is quite good with women, and is popular among them.
You is free-spirited, unrestrained, and laid-back. He can also be very vague, the kind of person who ends up toying with other and causing them trouble. However, while he appears to be flashy and troublesome, he possesses a strong sense of duty and one-track mind, although according to him, he would rather die than show that side of him. He also possesses a unique sense of beauty and worldview.
Among Procellarum, he is the one with the most common sense, making him the one in-charge of retorts. He also shows a great level of professionalism.
You is the third son of a monk, and had previous lived in a prospering temple. He has two older brothers, Sou, aged 26, who is a serious yet stubborn, and Tooru, aged 22, who is free-spirited and lively.
He and Yoru were scouted during a school field-trip to Tokyo.
You and Yoru are childhood friends, and they get along very well. He shares motherly personality traits with Yoru.
Whenever they have misunderstandings or arguments, most of time, its You's fault, although Yoru is the one who apologizes first. You tends to initially apologize sharply, but once away from people's gazes, he apologizes earnestly..
Back in middle school, there was a time they did not talk to each other and had distant. But Yoru gathered his courage to talk to You again so their friendship was continued on until now. 
Koi and You seem to get along pretty well, and they both get excited over their random conversations.
Their relationship is said to resemble a big brother and his younger sister. You knew of Matsuri's habit of neglecting meals and patiently deals with her when she started excitingly talk about particular topics.
Both You and Arata are open-perverts. They can talk about girls and inappropriate things that are not suitable for young ages.
- His given name, You (陽), which could mean either "sun" or "sunlight/sunshine".
- His surname, Haduki (葉月, Hadzuki), is the name for the eighth month of the lunar calendar.
- A way to call for You when searching for him is to sing "Genau!".
- You found and adopted a Magellanic penguin that he named Magellan since the summer of 2015.
- His room has a lot of books about curry and any ways to cook it.