Subjects in Charge: General Swordsmanship, Magical Astronomy
Riv is one of Lewin's swordsmanship proffesor.He sometimes grabs Lewin's neck when Lewin's punishment is coming. He is very strong as shown in some chapters of Aventura.
Riv wears a mask on the right side of his face, which stops his age growth. (He has the same age as Professor Arshes.It is shown in the Character Proflies in Volume 1, that he doesn't like sweets.
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