Yeah, so as a bonus I have this riddle broken into verses and each one has an explanation (a brief explanation) under.
In a way we are so alike,
(Hero is a hero, and Sepulchure was a hero)
On the other hand we are so different.
(We now save the world and Sepulchure wanted to destroy it)
We both have things to fight for,
(Hero - Friends, and Seppy his daughter)
And we both did things we didn't meant to.
(Like hero not winning the first time agaist Akriloth and allowing him to kill so many people,
and Seppy being only pawn for MS, he didn't wanted to be only used.)
We both can be dark,
(hero can be Doom Knight, and he failed to be the "light" for many, like Konan)
We both can be light.
(Seppy was a hero in the past, and he should be "light" for his daughter)
We are not strangers,
(no explanation needed)
But no way we are close.
(we never tried to understand each other, didn't we ?)
What bonds us is twisted,
(We were enemies but at the same time we joined forces, and he even saved our dragon using his evil powers.)
Cruelty and distress.
(no explanation needed, that is just how Seppy is... or was)
But there were times when we were close,
(again about the time with darkness dragon drakath and him saving our dragon)
Those single moments
In the oceans of dark.
(both times happened when there was darkness covering the world... or shortly after)
I was looking for you,
(Hero was looking for Seppy, a few times)
not wanting to know you.
(just to defeat Seppy)
You are you
(A Doom Knight)
And you are me
But you are not you
(No longer a Doom Knight)
And you are not me
(No longer a Hero)