like Undyne can mellow down for a kind human.
imagine if kindness fell in place of frisk
gets to waterfall with absolutely zero issue
undyne poses trouble since he cant just spare her in a straight forward way
but he is able to survive
udyne's will to fight slowly fades as he refuses to fight or run
intensity of attacks wanes until she asks "why wont you fight?"
he just mutters something about how there's a better way to do it where nobody has to die
passes out after the long and intense battle
this breaks undyne and she takes him in for the night
sends him off the next morning...
few hours later undyne realizes whats going to happen.
kindness is facing off against asgore, same situation but he's slowly losing
suddenly undyne's theme starts to fade in.
"ASGORE!"
smacks him with the blunt edge of her spear
"THIS KID DOESNT DESERVE TO DIE! HE'S NICER THAN MOST MONSTERS!"
asgore just looks at her from the ground, shocked that her of all people would turn and defend a human.