Everybody has their reason for stopping the Demon King, some not as honorable as others.
"I would die for you" 
is what the weak say.
Esa frase de "no me importaría morir 
por ti" solo la dicen los débiles.
Eso de decir que morirás por otro, es de débiles.
"Eu morreria por você"
é o que os fracos dizem.