Did you find the first teleporter there yet?
Tried again. Patchy took out Tewi by herself with one last Agni Shine, everyone else died. Got Reisen to about half health, and then she went "lol, no" and used one of her moves that hits the whole party with berzerk.
The hell.
Also, Tewi's first line has a bit of kanji in it at the end for me, and her second crashed my game.