『Yuuto Amakawa』

Yuto is the male protagonist of the series. He is a student at Touryou High School in Takamiya City, and is the sole descendant of the Amakawa Family(天河家, Amakawa Ke, ranked#6), one of the twelve Demon Slayer families who had fought and slain ayakashi for hundreds of years. His parents died in a car crash when he was eight years old and he fell into a deep depression when he arrived in Takamiya until Rinko helped him out of it. He also has a terrible cat allergy, which would cause his eyes to water and his nose to run as well as causing him to sneeze uncontrollably whenever he is near one(revealed to be Kuesu's doing, but later when Kuesu dies from Shuten-douji's fatal attack, she purifies Yuto. As a result, Yuto's no longer allergic to cats).

Yuto spent most of his childhood with his grandparents in Noihara, and shared a close bond with Himari when she was a cat. He also had a close friendship with Kuesu Jinguji, who would later be his fiancée. However, due to the strong protection spell placed in the amulet that his grandmother gave to him(an omamori), most of his childhood memories were erased, though they were later regained after his visit to his grandparents' home and his reunion with Kuesu. He is usually portrayed with a friendly and caring demeanor, but he can be shy and nervous in perverted situations or harem acts, most of the time with Himari. Yuto has also been shown to be acrophobic, which resulted from his childhood when he tried to climb a tree to get to Himari only for him to fall each time and when he fell from a cliff one night during his walk home, at which he suffered some physical trauma after Himari passed out using her demon powers to call for help. Upon learning of his family's Demon Slayer heritage, he is initially dismayed, repeatedly declaring that he has no intention of fighting. This later changes after he witnesses Himari's demon side in Noihara and during the Christmas Eve incident followed by Shuten-douji and Tama's appearance, as he soon realizes that he needs to start fighting to preserve his way of peace, thus prompting him to officially accept his Demon Slayer mantle.

As a descendant of the Amakawa Family, Yuto has the power of the Light Ferry(光渡し, Hikari-watashi), an ability that imbues ordinary objects(such as a pole or twig) with light-based energy, turning them into powerful melee weapons equivalent to that of a legendary blade. He can also imbue other weapons, shield himself from harm, and enhance his physical senses with it, one instance is when he imbued Himari's Yasutsuna to defeat Shuten-douji. He can also use it to trap other enemies as well as explained by Hitsugi, once doing so against Tesuma. In order for him to control the Light Ferry, Yuto must keep a calm mind and have good composure. Prior to having some control over it, the Light Ferry ability only emerged when Yuto was in a near-death situation. Although the Amakawa Family is a higher-ranking family, they were not well liked by the other Demon Slayer families due to their association with ayakashi. In addition, the Light Ferry power has only been descended to the male half of the family.