Ernest in Love Cast Lists
| Role | 2005 (Moon) | 2005 (Flower) | 2015 (Flower) | 2016 (Flower) |
| Ernest (Jack Worthing) | Sena Jun | Juri Sakiho | Asumi Rio | Asumi Rio |
| Gwendolyn Fairfax | Ayano Kanami | Toono Asuka | Kano Maria | Kano Maria |
| Algernon Moncrieff | Kiriya Hiromu | Ranju Tomu | Serika Toa | Serika Toa / Houzuki An (1) |
| Cecily Cardew | Shirosaki Ai | Sakura Ichika | Shiroki Mirei | Shiroki Mirei / Oto Kurisu (2) |
| Lady Bracknell | Izumo Aya | Izumo Aya | Yuuma Rin | Yuuma Rin |
| Lane | Kouki Subaru | Takashou Mizuki | Takashou Mizuki | Houzuki An / Serika Toa (1) |
| Parkins / Dr. Chasuble | Koshino Ryuu | Yuuma Rin | Yuugiri Rai | Yuugiri Rai |
| Alice / Miss Prism | Takigawa Sueko | Kasumi Fuuka | Mebuki Yukina | Hanano Juria |
| Dance Teacher / Maria | Hihou Kokoro | Tama Mayura | Nana Kurara | Mihana Rino |
| Greengrocer / Josef | Shiki Erio | Mochizuki Rise | Wataru Hibiki | Tenma Michiru |
| Piano Teacher | Asagiri Shino | Shiyou Rene | Haryuu Mitsuki | Yuunami Kei |
| Tobacconist | Ayazuki Seri | Tsukiji Kanade | Maizuki Nagisa | Saezuki Runa |
| Effie | Otoki Sunao | Hanagiri Wakana | Shiraki Akari | Shiraki Akari |
(1) Role-switch between Algernon and Lane
(2) Role-switch between Cecily and London Girl / Villager / etc.