https://www.mahq.net/dunbineep34/First off is the revelation that all the Aura Battlers and Aura Ships have a powerful barrier which prevents them from being harmed by those from Upper Earth. Although this somewhat contradicts what we saw when Shou first went to Upper Earth, its an interesting thing to note since the military forces on Upper Earth will really have to ‘up the ante’ to do any damage to forces from Byston Well.
I found the Aura Barriers fascinating because as the author notes the last time Shou and Dunbine were on upper earth conventional weapons appeared to be effective. My first thought was perhaps the aura barriers are dependent on the pilot's aura power, and with the Aura power of many of the protagonists and antagonists growing over the series perhaps that is why the aura barriers function now while they didn't in the past.
Aside from the TV show is there any details out there for how the Aura Barriers work both in Upper Earth and in Byston Well including any limitations?
On a related note are there any websites dedicated to Aura Battler Dunbine? Something like how the Macross Mecha Manual site is dedicated to Macross or the Moon Cocoon site is dedicated to Turn A? I think Dunbine is one of Tomino's more fascinating works and I'd love to read any deep dives people have put together on the subject.