As for the aspect differing from the regular baptism, I think it was mostly to the degree of Cardinal Hohenheim taking the role of the priest and the other high priests additionally taking care of the various chores, huh?
Since I was a valued client, the high-ranking clergymen weren’t stingy.
“The real baptism has finished safely, too.” (Hohenheim)
“Thank you very much. Please take this as gratuity.” (Wendelin)