A fanlisting is a place for all fans of a particular show, movie, actor/actress, singer, etc. to come together and build the biggest listing of people from all around the world who are fans of that subject.
Ritsuka, a young man dealing with the death of his beloved older brother, meets Soubi, another young man, who claims to be a friend of his brother.
Soubi tells Ritsuka that he is a "War Machine", belonging to his own brother, Seimei.
Moreover, he informs Ritsuka that he, Soubi, is under orders from Seimei to defend Ritsuka in the coming conflict. The fighting in question pairs a "Sacrifice" with a "War Machine", and the "Sacrifice" partner, Ritsuka in this case, suffers any damage incurred.
Soon, hired killers from an organization calling itself "Seven Moons" are attempting to abduct Ritsuka, who learns that the group is also responsible for his brother's death.
Determined to learn the truth about why his brother died, Ritsuka finds himself caught up in a war fought with words and their spellings.
Aoyagi Seimei is shrouded in mystery, and because of this, fully understanding him is extremely difficuly and I would venture to say impossible at this time. Too much is not known to understand his motivations and who he really is.
Early in Loveless, we learn of Seimei through the eyes of others and it is only in these remembrances do we start to see Seimei. At the beginning of Loveless, Aoyagi Seimei is dead. Murdered at age 17. Mourned by his younger brother Ritsuka, the picture of Seimei we get is of a very kind and caring older brother. One who is willing to face their mother's wrath to protect his younger brother. Through the eyes of Agatasuma Soubi, we learn of Beloved. Seimei's true name, and the cold, proud master he is. Together, they are a formidable fighting team. Without Seimei, Soubi is lost until he takes up his orders given to him by Seimei to be followed upon death. Take care of Ritsuka. And here it would have ended, with Seimei the handsome and kind older brother, if for one thing.
Aoyagi Seimei did not stay dead. Or rather, he never died. He engineered his own fake death for reasons yet unknown to us and is actively working with Nanatsu no Tsuki, an organization clouded itself in mystery with the seeming objective of killing Ritsuka. Seimei is seen as cold, shrewd, and often smiling cruelly. Here is not the nice older brother, here is a young man with a hidden agenda who appears to be contradicting himself. Why send Soubi to protect Ritsuka if he would later send people to kill the boy? What are Seimei's motivations? I have my own theories, but nothing has been confirmed. Seimei proved to be a mastermind and absolutely nothing that he seemed at first. The guessing Kouga Yun has left us playing with him is what attracted me to him, along with the darker side he has revealed in person in recent chapters.