Seita Yokokawa

"I will never... I'll never ever leave you again. Never ever. I promise.
 * —Seita to his little sister, Setsuko"

Seita is the fourteen year old protagonist of Grave of the Fireflies. After he and his young sister Setsuko lose their mother in the Kobe firebombing of World War II, their lives becomes a constant struggle for survival.