Isekai No Seikishi Monogatari Ss2 -

: Historically, the Tenchi Muyo! franchise experiences decade-long gaps between major installments.

While War on Geminar doesn't have a Season 2, the main character, , appears or is referenced in other parts of the Tenchi Muyo! universe:

: Geminar is a world of floating islands and Sacred Mech Warriors (Seikishi). These mechs are powered by "Ena," and only specific individuals can pilot them.

You're referring to the Isekai no Seikishi Monogatari, also known as "The Story of Saiunkoku" or "Saiunkoku Monogatari" for short. Specifically, you're looking for information on Season 2 (SS2) of this anime series.