It looks like the characters from Rising of the Shield Hero will be joining the characters from Re:Zero, Overlord, Konosuba, and The Saga of Tanya the Evil for the chibi crossover anime, Isekai Quartet. This is because the staff confirmed that Naofumi, Raphtalia, and Filo are all joining the anime’s second season!
The Shield Hero trio will all be meeting the characters from the other isekai anime in what promises to be yet another hilarious encounter in the chaotic crossover anime. And speaking of Isekai Quartet, here’s the anime’s new key visual, which sadly doesn’t feature the three new additions yet:
Isekai Quartet follows the characters from four (and now five) Isekai anime, namely Re:Zero, Overlord, Konosuba, and The Saga of Tanya (and now The Rising of the Shield Hero). The characters from these anime find a mysterious red button which transport them to yet another isekai… but now have to live the lives of regular high school students.
Source: Isekai Quartet Twitter account