|“|| I will never... I'll never ever leave you again. Never ever. I promise.
Seita Yokokawa (横川 清太 Yokokawa Seita) is the fourteen-year-old protagonist of Grave of the Fireflies. After he and Setsuko Yokokawa (Seita's younger sister) lost their mother in the Kobe firebombing of World War II, their lives becomes a constant struggle for survival.
Seita has dark brown hair cut short and dark brown eyes. He wears an off white Captain's cap or school uniform cap with a black viser and a beige Kokumin-fuku jacket with a name tag, white tank top underneath and beige pants with leg wrapping on his shins and black ankle lace boots.
- Kiyoshi Yokokawa (Deceased Father)
- Mrs. Yokokawa (Deceased Mother)
- Setsuko Yokokawa (Deceased Younger Sister)
- Seita's Aunt (Alive)
- Seita's Cousin (Alive)
Seita was born in 1931 and Setsuko Yokokawa is born in 1941.
Towards the end of the film, he passed away on September 21, 1945.
- The name Seita means "clear, pure, clean" (清) (sei) and "thick, big" (太) (ta).
- Seita's surname Yokokawa means "side" (横) (yoko) and "river, stream" (川) (kawa).