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.
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More from this season
S23 E1
The Ringed Magician
When strange magical creatures including something resembling the Minotaur begin to attack in Toriizaka, they are all confronted by a man with a strange ring and belt calling himself "Wizard".
S23 E2
I Want to Be a Magician
While trying to battle the Phantom Hellhound, Haruto is accosted by Shunpei Nara, who wants to be a magician just like him.
S23 E3
Transform! Live Broadcast
Shunpei Nara decides to go on live television to show off his burgeoning magical powers while Haruto tries to deal with both the young man and Hellhound's attempts to attack him now that it is clear Shunpei is a Gate.
S23 E4
The Doll and the Pianist
While trying to fight a new Phantom that has appeared looking for a new Gate, Koyomi is suddenly attacked by Medusa.