Sophie Peithos

Sophie Peithos is the final boss of Xenosaga Episode I - Der Wille zur Macht. It is a large Gnosis that is fused to the core of Proto Merkabah by Albedo. He unleashes it upon the party as he makes his escape. During the battle, it will occasionally summon Jaldabaoths and Ratatosks.

Trivia

 * This is the only instance where Battle doesn't play, being replaced by Last Battle.