Miyasaza Kuroi

Miyasaza Kuroi, known only as Kuroi in the first 10 chapters of Astral Academy, is an antagonist and Dorm C's leader.

Personality
Kuroi is calm and talkative, and is only seen by Asahi during lunch. He keeps his last name hidden due to the crimes of Miyasaza family. He is good at manipulating others.

In Astral Academy, Kuroi possesses a lot of power as a Dorm Leader. He has the Principal's permission to study the students for his own gain, and he uses this to attempt to reincarnate the devil.

The Plan
Kuroi's plan is to use the power of all of the students combined to reincarnate the Dragon God, who was wiped out 50 years ago. The student with the strongest aura is Asahi, which makes him inclined to take his power. In Chapter 9, he successfully kidnaps Asahi and uses him as a prime target before Sayu sets him free. However, Kuroi's plan was already close to completion.

Sayu and Namida chanced upon a set of documents regarding Kuroi while on the search for Asahi, which reveals information that he has kept secret. His last name, Miyasaza, is connected to the infamous executioner with the same surname. His birthday is also revealed to be April 9, a mix of two unlucky numbers, and Namida infers that Kuroi kept this hidden to keep his sweet-guy act which was neccessary to get info about Asahi.

Asahi ends up very weak after this and limps around in his dorm, which causes Sayu to take responsibility. With the two main threats occupied, Kuroi starts the ritual. It ends up successful, but the sheer power used in the ritual caused the school to shake and all of the students get up to the top to see what's happening. This is where Kuroi gets found out- something not part of the plan.

The devil he had revived was an amalgamation of entities because of the power used to revive it, which made Kuroi need to stall time. Mid-chapter 11, it's true form is revealed, making Kuroi's plan a success. In order for the Dragon God to use his full power, Kuroi had to be alive. Erizu killed him (L). However, Chysr and Artyms leap behind him and use the dragon's remaining strength to grant the two of them immortality.

Early Life
Kuroi had always been fascinated by history, and was taught many things from his mother, who was an executionist.

Astral Academy
Kuroi is the main antagonist. Prior to the main plot, he forced the principal to make him a dorm leader, nearly threatening them until he got what he want. He's known to do a wicked amount of experiments (revealed to be for reviving the Dragon God). He usually appears in the Great Hall during lunch and dinner, sitting next to Aurora, a student in his dorm room. He acts like the typical nice guy around the main four, not very good at small talk.

One night, he meets Chysr in the dorm hall. After a conversation with him, they talk about the Dragon God and his origin. Chysr also agrees with him to summon the Dragon God if he can get granted immortality by him.

In Chapter 8, he kidnaps Asahi to take his power by force. In Chapter 9, he gathers enough power and runs to the roof in order to manifest the Dragon God. However, due to the long time taken, he was eventually found out and confronted by the Dorm A students. After a long monologue, he is killed by a stab in the chest.

At the end of the story, Kuroi is at his knees, apologizing to the principal. They don't know if they accept his apology or not, but they have kicked Kuroi out from the list of dorm leaders, and prevented him from using the research room.

Niyada Asahi
Someone he dislikes, but is necessary in order for him to pull off his "plan". He often gets personal with Asahi in order to learn more things about him. Sayu doesn't like him since Asahi is his crush. He first is interested in him due to his sheep horns.

Ashikage Cian
Dorm mate. Kuroi trusts him the most and tells him his deepest secrets, which includes his last name, and the Plan. When Cian goes over to Dorm A, he actually tells Shinai (and Asahi in Chapter 9) all of the things Kuroi told him.

Ashikage ends up revealing all of this information in Chapter 10, causing Kuroi to get angry at him.

Chysr
He meets Chysr in the hall at night. He thinks Chysr is mysterious and is interfering with his plans. In Chapter 9, he has a conversation with him about the Dragon God. They made an agreement and decided on both of them receiving immortality when the Dragon God was summoned- however, Kuroi collapses and passes out before he can do so.

Trivia

 * Before the events of the story, he asked the principal to remove his last name from all legal documents.
 * His original intention was to take Asahi's horns until he said that they wouldn't come off.