Toko Katsuragi is a beautiful female archaeologist housed in Yamato on the 11th planet. Her true identity is that she is a loyal informant of the Great Emperor Zworder, and is a copy of Sifar Saberah, the last survivor of the Zemurian who once created and ruled Gatlantis. After her true identity was revealed, Toko lost her link with Zworder due to the sensory waves and became a prisoner inside the Yamato. While she laughs at human love, Toko gradually revives the memories of Sabera's love that had been sealed away by Zworder. She orders the storyteller who manages the data bank of planet Zemuria to reveal the origin of Gatlantis and the secret of the safety device Golem that will wipe out all artificial life at once.[1]
Katsuragi would eventually be killed when she unintentionally revealed Yamato's position within the Ark of Destruction's interior as she telepathically spoke to Zwordar, resulting in multiple Eater ls targetting the battleship. Despite the efforts placed on the main guns, the overwhelming amount of crafts pierced into the ship, destroying the navigational room Katsuragi was in, which resulted in her demise.