I just realized that the evil man heading the groups which has members with numbers, has number 0. I read the Fairy tail and I came across with Master 0, master of Orecion Seis and , he reminds me Mr.0 from One Piece!
So I have a question... When considering the power of these men, which math's properties should we use? The zero property of addition or, the zero property of multiplication? Eventually, zero is identity element in addition whreas it is absorbing element in multiplication...