TV-Series
Description
Kōyō Kasugai is a character in the Fafner series who first appears as a student on Tatsumiya Island. He is a gentle and considerate young man, often putting others before himself and avoiding conflict. He cares deeply for his classmate Shōko Hazama, who is bedridden, and secretly keeps a dog named Chocolat, a reference to her name. Kōyō’s background is marked by a lack of familial warmth: his adoptive parents view him as a tool to secure their place on the island and show little genuine affection, which fosters a deep-seated fear of being unwanted or rejected. This insecurity drives him to seek approval and maintain a cheerful facade.

When the alien Festum attack, Kōyō is selected as a Fafner pilot, one of the few young people chosen to operate the mecha. He initially shows promise but harbors self-doubt about his abilities compared to his friend Kazuki. After Shōko dies in battle, Kōyō’s emotional stability shatters. He blames Kazuki and Soushi for not saving her, and his bitterness leads to reckless behavior. During a mission, he is assimilated by a Festum and falls into a coma. He later awakens as a hybrid being, part-human and part-Festum, gaining new abilities and a radically changed perspective. This transformation makes him a symbol of the possibility of coexistence between humans and Festum.

As the story progresses, Kōyō evolves from a supporting character into a central figure. He regains his composure and becomes a bridge between the two sides, using his unique status to communicate and mediate. He pilots the Mark Vier Kai and develops a Special Development Power, a black blade that can harm Festum. His enhanced memory and analytical mind, noted as exceptional, aid him in combat and strategy. Despite the trauma, he maintains a desire to protect his friends and find a peaceful resolution. His key relationships include Kazuki, with whom he shares a complicated bond of rivalry and reconciliation; Maya, a close friend who supports him; and Soushi, whom he initially resents but later respects. Kōyō’s development arc is one of loss, transformation, and eventual acceptance of his role as a link between two worlds. His presence in the narrative underscores the emotional toll of war and the possibility of understanding even the most alien of enemies.