[Kari's only just arrived back in the village and hasn't had too much time for looking back on the journals. But Rei's little message about a "traditional holiday" is enough to make her realize what day it is -- she lost track a little amid all the books she was cross-referencing on her mission. And seeing as she's feeling a little restless after being cooped up in a library for a few weeks, she decides to do something about it! After all, it's just not Setsubun without an Oni, right?]
[So at some point during the day, she'll be sneaking her way up to the shrine, wielding an "Oni" mask made from somewhat poorly-cut construction paper and wearing a yukata loosely thrown on over her clothes. But she won't actually slip on the mask until she gets close enough, waiting for the opportune moment to strike! The opportune moment being, of course, at any point where Rei has her back turned. At which point Rei can expect to hear a sudden and very loud:]
[Action]
[So at some point during the day, she'll be sneaking her way up to the shrine, wielding an "Oni" mask made from somewhat poorly-cut construction paper and wearing a yukata loosely thrown on over her clothes. But she won't actually slip on the mask until she gets close enough, waiting for the opportune moment to strike! The opportune moment being, of course, at any point where Rei has her back turned. At which point Rei can expect to hear a sudden and very loud:]
Gyaaaar!!!
[That's totally the sound an Oni makes, okay.]