Avaro, Gretto
About this character
Gretto is the younger brother of Maiza Avaro. He is one of the Advenna Avis immortals. [Spoiler] Maiza gave him some of the knowledge on how to make the immortality elixir. Szilard then "devours" Gretto in order to gain this knowledge. [/Spoiler]
Anime and manga appearances
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