Seita

Seita is responsible, mature, and tough. Since his dad is away fighting in the war, he is responsible for all the jobs his father would normally take, including caring for his younger sister, Setsuko. Seita's main fault is his pride, which can cause him to make wrong decisions.
Seita's mother dies after a bombing raid on their town Seita's father assumed killed after Seita learns the entire Japanese fleet was destroyed, Seita and his sister become orphans Seita's sister dies of malnutrition at the end of the movie, leaving Seita on his own