The assistant to the school director Ryuuzouji Kouzou and former history teacher at Sakaimachi Academy. Mitsuki and Takuya have a history with each other and remain good friends.

Takuya Arima is a young student whose father, a historian who has conducted various researches, disappeared recently. During a summer vacation Takuya receives a peculiar package from his missing father, along with a letter containing information about the existence of various parallel worlds. At first Takuya doesn't take it seriously, but soon he realizes that he possesses a device that allows him to travel to alternate dimensions. Is his father alive, after all? If so, where is he?<br><br>

(Source: TLWiki)

__Height:__ 156 cm
__Agency:__ I'm Enterprise

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**Non anime roles:**
- Sena Himuro - Blue Archive (Video Game)
- Ruan Mei - Honkai: Star Rail (Video Game)
- Dana - Ys VIII Lacrimosa of Dana (Video Game)

Episode 26.5, reward for reaching at least 1000 sales for the first Blu-ray volume. The episodes shows different possible outcomes for the protagonist. 

Takuya's father died during an accident while he was doing research. Worried about his young stepmother, Ryumi, Takuya follows her to Ken point. Watching her and her best friend, Mitsuki, from behind a rock, a sudden flash of light turns into an unearthly beautiful woman. The mysterious woman slips a ring on his finger, and Takuya's travels into a parallel world begins. <br><br>
This ring is the key between Takuya and his different realities. 

Mitsuki Ichijou