: Seiya Ryuuguuin and Ristarte appeared in cameo roles, adding to the supernatural classroom mayhem. Key Highlights & Plot Points
While the original quartet included characters from , KonoSuba , Re:Zero , and Saga of Tanya the Evil , Season 2 officially introduced: Isekai Quartet 2nd Season
The season maintains its focus on slapstick humor and cross-series chemistry rather than deep lore. Isekai Quartet 2 Episode 04 - Overlord Wiki : Seiya Ryuuguuin and Ristarte appeared in cameo