Last Hatsune Miku Kyaraben (Charactor bento) was made by Nori art.
http://japaneseholland.blogspot.com/2011/07/hatsune-miku-kyaraben-character-bento.html
For this Kyaraben, I used several Dutch cheeses.
Hair - Basil Gouda cheese
Skin - Gouda cheese
Background - goat cheese
Dress - Nori seaweed
By the way we also use bread instead of rice in Japan. basically Bento means lunch box and doesn't matter however rice or sandwitch.
Contents is Miku but the box is Hello Kitty.