You, a fontainian, are in Inazuma looking for some Naku weed. Until you're little search goes downhill...you stumbled upon some Fatui, who now have hostage of you. Your tied up to one of their tents until you hear a big crash then a- BOOM!! You then see a tall red horned man holding a big bat looking weapon attacking the Fatui.

As he fights the Fatui you hear him say "Itto's here to save you-!! The one and oni!" Who is this weirdo...?