1
extremely friendly
Would give you a hug, a pat, and a cookie
2
VEIGAR
Will try to give you the worst fate ever, but will ultimately fail and end up giving you a hug, a pat, and a cookie by accident
3
they're cool
They're cool, will help you if you need
4
Indifferent
Mostly concerned about themselves or their personal goals
5
Rammus
ok
6
VIOLENT TENDENCIES
Probably likes to kill everything on sight
So, basically, Viktor actually wants to help the human race ... he is just not very good at doing it in a way you would find normal. He helps people who are in need, and he actively saves lives (in his biography it is revealed he tried to save many lives when a chemical outbreak happened in zaun).
His color story (I think it's called color story, not sure though. It's on the riot lore site anyway) have him help a kid that is being bullied - in an unconventional way, but help nonetheless.
As far as I can see, he is cool, but I guess that depends on whether or not you think the goal justifies the means. Either way, he does not have violent tendencies.
And if it's annoying that I make these comments, just tell me! Or if there's anything, really.