Aona Day (Japanese: 御代アオナ, Godai Aona) is a character appearing in the anime series, B-Daman Fireblast. She is Kamon and Ryoma's older sister, and Greg's daughter.
Aona appears to a little taller than Kamon, she has dark teal blue colored hair that's appears to be mid-length with pale pink headband and teal eyes. She wears a elbow-length sleeved layered jacket, yellow colored over orange ones and with white collar and laces. Underneath it is a blue dress and a pair of peach red boots.
Since the fateful day when Kamon lost his memories after his defeat at Ryoma's hands, she took it upon herself to take care of him, not wanting him to be killed should the two brothers ever fight again.
The aspect of Aona taking care of Kamon as she ran her restaurant is a reference to Mie Delgado caring for Yamato while running her cafe.
Younger Aona in the Day family photo
Aona and Himiko at the end
Aona scaring Kamon with an Angler Fish (Click to view)