I don't understand his reasoning in not being baptized because it is imperative that he does this to beat his Arch-rival.

This term to baptize is infamous to the Freezing series but can other girls do the same thing as Rei Arcadia wants, and why does Rei Arcadia wants to do this with Lux.

I saw this listed under his trivia, and I want to know if this gives him any benefits at all.

Can I know what is this based on