It reveals that the teacher wanted to help them Tenma escaped both times we were faced with these last golden saints and not even being a saint of Athena, but goes to get his head for personal reasons.
Defeat Andromeda got petrified; he recovered after Perseus' death.
Knowing the situation that he is a Saint from the future, Shion lets him order to help in Athena, who was turned into baby Cronos, from the clutches of the Pope and Pisces Cardinale.