Mithos Yggdrasill (ミトス・ユグドラシル, Mitosu Yugudorashiru) is the main antagonist of Tales of Symphonia. He is introduced under his surname as an adult, but is able to interchange into his child body since his appearance and growth is controlled by his Exsphere. He was originally a kind hearted person despite the discrimination he faced for being a half elf. Four thousand years prior to the game, he and his companions, Martel, Kratos Aurion, and Yuan, ended the war between the countries Sylvarant and Tethe'alla by using the Eternal Sword and splitting the two into different worlds. His plan was to reunite the worlds when the comet known as Derris Kharlan approaches Earth so he can use its mana to germinate the Great Seed into a Giant Kharlan Tree. The humans attempted to monopolize the Great See