A hero appearing in Grimm's Notes and a central figure in the Storyteller's Domain of Momotaro. A legendary young samurai born from a peach. To repay the kindness of the old man and woman who raised him, he sets his sights on Onigashima. A brave yet kind-hearted youth, he believes that subjugating the ogres is the only way to bring peace to the world. He cherishes the companions bound to him by the bond of millet dumplings—the dog, the pheasant, and the monkey—as if they were his own family. Born from a peach, the boy grew up healthy under the love of his grandparents. Gentle by nature, he dislikes conflict and treats both humans and beasts without discrimination. However, to protect what he holds dear from the ogre raids, he reluctantly heads for Onigashima. The family bonds woven by the millet dumplings he was given are his greatest weapon. He eventually falls in love with the Ogre Princess.

The princess of the ogres living on Onigashima. While she resents the humans who persecute her kind, she is pained by the endless cycle of conflict and worries for the future of the ogres, who seem destined for ruin. Meeting Momotaro when he invades the island allows her to see a glimmer of hope for a future between ogres and humans, but she suffers from the conflict of their incompatible circumstances, eventually throwing herself into the fray. Though she initially hated Momotaro and approached him while hiding her identity, she comes to love him as she learns of his true character.