Kamen Rider Season 23 Episode 27
Big Sister and Little Sister
When it is discovered that Mayu is the twin sister of Misa, the girl who has become Medusa, Mayu makes it her mission to seek out the one part of her sister that is still alive within Medusa, even though Haruto believes it is better to save Takako first.
Guest Stars
Hiroyuki Kaiho
Mayu Inamori's father
Arisa Matsuzawa
Mayu Inamori's mother
Rishika Yu
Takako