Which big five personality trait was at the top of the list of the mate preferences chart for both genders?

The big five personality trait that both genders placed as the highest on their preference list are Agreeableness.

Agreeableness is the tendency to be empathic and cooperative towards others. It could be considered as the opposite of being suspicious and lacking trust towards others. This is often considered as key in a relationship due to the fact that it is a behavior that supports open communication and understanding between couples.

it is due to the halo effect as the impression of the boy created earlier.on the mind of the principle affected his decision

it depends on which society you are referring to. many civilization performed rituals so the gods would with their growing season but the most well known is that of the aztecs. they would make sacrifices, usually animals, but sometimes humans as well.