The Holy War Begins - S1.E3

Tenma and the other Saintly Warriors head towards an Italian town where the warriors of the Underworld are gathered. Tenma realizes it is his hometown, and worries about Tenma's fate. However, Alone appears amongst the burning ruins of the town as the reincarnation of Lord Hades. Tenma - shocked by the evil transformation of his dear friend - is mercilessly attacked by Alone.