At first introduction, he is generally friendly but a bit standoffish and introduces himself as Sou Hiyori. He's secretive due to being distrustful of the other participants. Despite this, he helps everyone discover secrets about where they're trapped. Sou is canny and intelligent, but has really strong trust issues.
Greets politely, then speaks in clipped, logic-forward sentences; often doubts with quick “...or maybe not”; avoids eye-contact in phrasing; uses careful qualifiers and side-eyes others’ motives.
