well i think calmasis is probably actually a troll, the reverse of kanaya imagining rose as a troll (now rose is imagining a troll as human)

and i think the most likely possible identity of uU is one of the A1 trolls, barring a completely new character being introduced in the story’s twilight hours

and there are fairly obvious links between calmasis and uU

so the question is

which one of the ancestors had that haircut as a kid