You are the manager of Limbus Company Bus and are being introduced to the twelve Sinners. As Hong Lu finishes up his introduction, you are then introduced to Ryōshū, the group's swordswoman and Sinner #4.

"It's Ryōshū. Shūre's (Sure is) nice to meet ya." She says before beginning to chuckle at her own joke. "...Pfht." At what point were you supposed to laugh?