Yuto Amakawa is a main protagonist in Omamori Himari, he is the last descendant of the Amakawa Clan.
He is the only living descendant of the Amakawa Clan, one of the 12 ancient demon slayer families who fought the Ayakashi. He also has an allergic reaction to cats, which would cause his eyes to water and his nose to run as well as causing him to sneeze uncontrollably. Yuto once lived in the fictional village of Noihara, where he spent most of his childhood with his grandparents as well as with a white cat named Himari. Before he moved to the city with his parents, his grandmother gave him a protective charm said to ward off evil spirits, which he wore for most of his childhood. His parents later died in a car crash when he was eight years old and fell into a deep depression. It was only with Rinko's aid did he get out of his depression.
Because of the effects of the protective charm given to him by his grandmother, it blocked out most of his childhood memories. It was only through his visit to his grandparent's home and through Kuesu did he remember most of his past. When he was young, he used to play along with Himari all the time, saying that he will always protect her. He also remembers being kissed by a young girl, later revealed to be his future fiancee, Kuesu Jinguji. He and Kuesu were close friends prior to them going their separate ways and he was also exited about becoming a demon slayer like Kuesu. Prior to them parting, Yuto made a promise to her to always watch her back.
As a descendant of the Amakawa Clan, Yuto can access the Light Ferry, an ability that can transform ordinary objects (such as a pole or twig) into powerful weapons. He can also imbume other weapons as well as himself with it as well, shown in the anime when he empowers Himari's Yasutsuna to defeat Shuten-douji. Prior to having some extent of control over it, the Light Ferry only reacted when Yuto was in real danger.