The "Octo Squad" has a Meaningful Name (at least by the time the Second Original Generation occurs): the squad's Humongous Mecha all use some form of Dual Wielding or Guns Akimbo - dual Plasma Stakes (Gespenst MK II M Custom Type-G), dual Plasma Cannons (Gespenst MK II M Custom Type-C), a pair of Blade Railguns (Siegerlion) and a pair of Seize Anchors (Giganscudo Duro). Four machines, armed with a weapon on each hand: in other words, "eight arms".
The episode subtitle for the Second Original Generation is "Gaia Saviour": at one point in the game, Arteil Steinbeck declares the "Gaia Sabers" will be the ones who will save the Earth. For all intent and purposes, it seems the Gaia Sabers are whom "Gaia Saviour" is a reference to, except "saber" is explicitly spelt differently than "saviour" for the in-game text (in English, no less). It becomes clear that "Gaia Saviour" is not referring to the Gaia Sabers, but to those who can save Earth the best. Is it the Gaia Sabers? No; the "Garden of Baral"? No; it's the "Steel Dragon Battle Group", who are specifically selected by Irui Gan Eden during the finale of the Second Original Generation.
This is reinforced with the Gespenst Haken in The Moon Dwellers: it's explicitly stated the machine uses the same Swiss Army Gun that Haken uses, perfect for him as The Gunslinger, whereas Kaguya, Suzuka, Neige and Aledy wouldn't know how to effectively use it in accordance to their abilities. As for Aschen, who becomes the Gespenst's permanent sub-pilot, she can easily fulfill the unit's secondary functions logistically and analytically via combat data, perfect for an Artificial Human such as her.
Scenario 27 of Original Generation 2 sees our heroes trying once again to rescue Seolla and Ouka from the clutches of the School. When Latooni and Ouka fight, Ouka comments, "You're so stubborn. That's what makes you so cute." Just your average Les Yay battle banter... And then you remember that Ouka's being brainwashed by Agilla Setme and suddenly all these horrible visions start pouring into your brain.
May also have to do with Ouka's views of Latooni distorted due to the suggestion and brainwashing as a side effect, Ouka does care for her fellow friends who survived the School before. Latooni, Arado, and Seolla were all she had to consider as a family aside from a large supercomputer.
At the ending of the "The Inspector" Anime when Beowulf appears, everyone shrug off his presence there as nonsense and get back into the fighitng. The thing is, when you think about what he was shown doing in the first episode, plus the strange einst units he bring along (who all look like some mechs of the good guys...) paint a very bleak image of what Kyosuke's corrupted alterego was up to between his two appearances.