@DY4Y, you are absolutely right.
I confused diphthongs and clusters, (which is incredibly embarrassing!)
Also, writing Latin in Greek is quite rare if not exceptional for me (and most greek people) so I'm completely clueless about the order of the letters in that case. I just mentioned how the word in the picture is supposed to be IF written in greek, I'm certainly not implying that the artist got it wrong. I just got (over)excited to see something related to Greece here.
I referred to Tokui-san's name as a fun thing. The truth is though that for many people, Nico and herself is a Muse and a
goddess and the number one idol of the stars! (Soramaru must be sneezing all day!)