Ais Wallenstein (アイズ・ヴァレンシュタイン) is a supporting character in Is It Wrong to Try to Pick Up Girls in a Dungeon? IV Part 2, voiced in Japanese by Saori Oonishi. The series' music includes "Is It Wrong to Try to Pick Up Girls in a Dungeon? II - Opening | Hello to Dream", "DanMachi Season 4 Part 2 - Ending Full『Kirikizu』by Sajou no Hana".