sekaiju_no_meikyuu_s
Short-lived mobile gacha spin-off of the Sekaiju no Meikyuu series. Its only new character was Bunny (sekaiju s), who appears as a guide in the tavern.
Full title: Sekaiju no Meikyuu S: Yuukyu no Hasha
English title: Etrian Odyssey S: Eternal Conquerors