She's the sister to Mikazuchi and love interest of Yamato. She was sent as an undercover agent to win Yamato's trust and steal Susanoo away from Yamato and murder him. Things become complicated as Oto develops a real bond with the group and even falls for Yamato. Because she has been contaminated, she was also marked for death amongst her peers. She later finds out that she's actually not related to Mikazuchi, but a little girl taken away from her real mother. Mikazuchi however never knew about this and after being possessed by Orochi he used the dark energies of Orochi to corrupt Oto's soul. It was not until Orochi broken the psionic bind between Mikazuchi and his mech that her mind was free from dark influence. Towards the end of the series she now lives in the village along with Yamato. There was no epilogue to speak of her fate, but it is assumed that she will eventually have a real romantic relationship with Yamato and marry him.  Source: Wikipedia

In the 25th century, a spaceship carrying 300 people leaves the earth in search of a new world in the solar system, but an unexpected accident occurs. They crash into a black hole which is connected to another universe. The people on the ship are cast adrift in an emergency capsule to a planet called Ismo. The story begins 12 years after they have reached Ismo. 
Ismo is a star of the Onam System, which corresponds to the Solar System in our universe. It is the only planet left in the Onam System. The Death Star called Yomi is a comet which regularly approaches the Onam System. 
There were once 8 planets in the Onam System. Many years ago, in the time of the gods, there was a war against the evil monster Yamatano Orochi (an 8-headed snake-like creature). The gods won the battle. Yamatano Orochi was locked into 8 stones, one of which is buried deep in the center of each planet. Nobody was supposed to have access to the core of the planets. However Tsukuyomi, an evil god who rules Yomi, succeeded in reaching the stones one after another, destroying 7 of the planets using his powerful robots, the Sky Warriors. However, when he tried to acquire the last stone from the planet Ismo, the most powerful Sky Warrior, Susanoo, got out of control and was blown away. 
A million years later, the Death Star Yomi is approaching the Onam System once again. Tsukuyomi, the master of Yomi, plans to take this opportunity to realize his dream of ruling the entire universe. He is desperate for the last stone containing Yamatano Orochi. If Tsukuyomi can get hold of this stone, Yamatano Orochi will return to life and its power will become his. Tsukuyomi needs Sky Warrior Susanoo to capture the stone, and sends 8 Sky Soldiers to get Susanoo back. But it is too late. Susanoo no longer belongs to Tsukuyomi. It belongs to Takeru, a 13-year-old boy from Earth, who happened to discover the buried robot Susanoo and woke it from its million-year-long sleep. Takeru becomes involved in the battle against the Sky Soldiers and their evil master, Tsukuyomi. Susanoo stands up to protect his friends and their planet. 
(Source: AnimeNfo)

__Height:__ 154 cm  

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Daughter of voice actress [Kazue Tagami](https://anilist.co/staff/164196/) and film producer Akihisa Kanai. Married to voice actor [Koichi Yamadera](https://anilist.co/staff/95011) from 1993 to 2006.

Three years have passed after the decisive battle at the end of Yamato Takeru and peace has return to the land. Takeru, Oto and their friends return to the village and continue living their days in bliss until one night Shuranoo, piloted by Mikazuchi, marks a return and appears in the village to wreak havoc. Takeru is left without any choice and is forced to reactivate the sealed Susanoo from his slumber. However, this is just the beginning of a new threat, and Takeru has to overcome himself if he wants to rescue Oto from the impending danger. 
(Source: AniDB)

Oto Tachibana