Menkar was the Caelum saint of the Century XXI. He and Fly never were loyal to Atena or to Mars.
Michelangelo becomes a saint because he wants to see beings created by him fight against the enemy. So, how his creatures are objects that got life, they are golems.
Michelangelo hides in the underground the Earth Ruin to protect it, but, when his golems were defeated by the saints, he gives up and get away, leaving the ruin with no protection. His clothes and post in were only a level up of his hobby.
The Golems of Michelangelo go help Ichi to defeat Kouga and the other Saints.