Not to be super deltarune on main but maybe Kris wants to make the whole lightener world dark cuz that's when they're in control of themself
And it adds to the part of the pacifist run where after fighting spamton, they're unnerved and even go so far as to scream. Cuz spamtons whole issue was that he was never truly free, and even with a new body he was a puppet on strings, akin to kris's situation with the player












