When the Pandoran stops fighting me ... EDIT: and coming back at the end of the year

I’ve done it again, because in my first attempt I thought there was a Triton in the last chamber with the bombard Chirons with very high HP, but I wasn’t sure. He was killed from my overwatching squaddies before I could take a deeper look on his info screen.

Now I got him again without killing him right away and he looks like a Marksman Alpha, the same as in the first chamber:

But his Info screen tells me that he is a “Praetorian” with way more HP:

I never saw a Triton like this one before and he is also not present in the wiki.

He was also able to shoot a high stealthed Infiltrator (Edit: 90%, it was my Priest / Infiltraor, but not revealed, no enemies close by, only 2 of these Tritons far away) from very far away (roughly 30 tiles or even more) without get revealed (probably because he has very high stealth and the Echo Head mutation). Now this happened also to me for the first time ever what was reported in the other thread about the cheating AI.

Special forces for the last mission only?