Board Thread:Spoiler Discussion board/@comment-37211085-20181023122331/@comment-112.200.234.220-20181030080544

I think her sin, gluttony, comes from her hunger and thirst for knowledge, not food itself. I remember reading a chapter from the manga (or maybe watching the last few episodes of s2) and someone said that she's always hungry for knowledge. Maybe because of her wish to discover and experiment whenever she can, she had done something wrong, and made her get the title "Boar's Sin of Gluttony".