>>107041444Being chaotic neutral doesn't mean he's "lol so randumb," it just means that he is willing to break laws, trust and bones to get what he wants. You could argue that this makes him evil, but in this case, what he wants could arguably be called noble - the safety of the human race.
So, he's not Lawful because he is willing to lie, cheat and steal to get his way. A Lawful Evil character could still do this, but they would rely on exploiting the system to get what he wants, whereas we see Viren consistently go against the will of the council and do his own shit. Also, he's a little bit on the impulsive side since he summoned the Pentarchy without much of a back-up plan for the inevitable fallout it would cause him.
He's not really evil either. He's a fucking asshole, yes, and he's willing to pit his own children against each other for his own gain, but he seems to genuinely care about the safety of his Kingdom and that of humanity as a whole. It's possible that as he is affected by Star-Elf boy's influence he might dip into full-on evil, but I don't think he is there yet.
Also, he's definitely not good, for a lot of obvious reasons. So that leaves Chaotic Neutral as the best fitting alignment for him.