This is a chestnut character bento perfect for fall. He's cute with or without the burr, so try the version you like best!
My children were enthralled by chestnut burrs when we went chestnut picking, so I made this bento for them!
The shape is like a triangle onigiri with a tapered top. You don't need to cover the whole rice ball with the spikes if you're making chestnut burrs -- just where it's visible.
Enjoy Japanese food around the world.