Густав

Gustave, the guildmaster and master of the Ehrenfest Trading Guild, constantly tries to lure Myne into his own shop as soon as he learns about her and the products she continuously invents. Despite it seemingly being a cruel act to sell his granddaughter Frieda, he signs a lifelong contract with a lower aristocratic family after learning that she has a wasting disease, as this is truly the best way to save her life.