That's a good point, but it also calls to light an inherent problem with the series itself: the only characters that get any kind of well rounded interpretation are the main figures in Team Dai-Gurren. Even Kittan gives us a more well rounded perspective than Viral, although Viral is arguably the more complicated character, simply because we rarely see Viral outside of combat situations. The times we do? He's with Team Dai-Gurren, who are his former rivals and therefore earn all of his roughness.

The only other occassions we see him out of combat are during his time with the Human Eradication Forces, where he was distantly polite to an almost absurd level, and in prison where he was exceedingly bitter and taking his anger out on the others around him--particularly Simon.

Here in Luceti several of those reasons are taken away, and it should be pointed out that he's not here to make enemies. He could have broken out of the Prison at any point during his stay (and, in Lagann-hen, did so to protect Simon from an aggressive Antispiral!Nia) but willingly chooses not to because all he faces is more combat that he cannot win. Should he end up with enemies here in Luceti, it would be the same exact situation, only worse. The people that die here don't stay dead. It would literally be combat for eternity.

I will take the suggestions into account however, and try to incorporate them. Frankly? The people who have earned his snark thus far are the people he moderately likes. Which...is also an indicator of the little bit we see of his interactions in canon. Unfortunately, there's only 3 people he actually thinks are moderately okay, and all of those are due to Shift influences.

Thank you once again--that was a helpful pointer.