Frog is a blend of contradictions. He is a lighthearted pacifist who loves art and nature, yet when Worm’s growing instability threatens the city of Tokyo, Frog shoulders his mission bravely and resolutely. He speaks courteously and respectfully to Katagiri yet proves capable of stirring fear and terror in his enemies such as Big Bear Trading and Worm. Frog is also surprisingly bookish, and his speech is littered with highbrow references to Western thinkers, including the philosopher Friedrich Nietzsche and the writers Joseph Conrad, Leo Tolstoy, and Fyodor Dostoevsky.