A strange creature named Koyemshi introduces itself to the group. Takashi is chosen as the next pilot of Zearth, and he resolves to be a "hidden hero" and protect the Earth.
We're protecting the 
Earth, so... The Earth.
.نحن نحمي الأرض، لذا... زي آرث
Er beschützt doch die Erde, oder?
Deshalb „Zearth”.
et qu’en anglais, c’est the Earth…
J’ai pensé à « Zearth ».