Taiyo Hayakawa

Taiyo Hayakawa (早川太陽) was the younger brother of Aki Hayakawa, who was killed by the Gun Devil.

Appearance
Taiyo was a young boy who heavily resembled his older brother.

Personality
Taiyo was innocent and fun-loving, caring a lot for his older brother and parents.

Eternity Devil arc
Taiyo, though sick, went outside to play with Aki in the winter. After a snowball fight, he ran inside his home to get a ball to play catch with when suddenly he and his parents were killed by the Gun Devil in the blink of an eye.