Okay...so the ranks of the 13 original apprentices is the same as that of their senseis.

So it'd go like thi(I'll give y'all their TRUE names too):

I-Tanex/Nathan
II-Erixa/Eria
III-Marlex/Larem
IV-Xirian/Ariin
V-Sarixen/Resian
VI-Lexian/Elian
VII-Nyx/Nyx
VIII-Triskix/Kristian
IX-Xemmsur/Summer
X-Liliax/Illia
XI-Xeros/Eros
XII-Xarin/Arin
XIII-Nevx/Ven

Ranx(Ranichi) and Anamx(Mana) don't have a rank...but Anamx IS Namine's apprentice.

Any questions?

~Mei~