(from Durarara!! LN 13) (SPOILERS)
“About Orihara Izaya.“ Manami requested, her voice mechanically even and without much inflection:
"Please tell me what you know, of what that man truly hates.”
“I want to make him suffer as much as I can, and kill him.”
“What he… hates, huh… Ah ow ow ow.” As Shinra walked, he groaned occasionally,
as if his joints were aching.
However he was smiling slightly, and with his red eyes he resembled a strange pierrot.
Shinra, recalled the past as he made an answer to the girl’s question.
“Yeah… Generally speaking, Izaya does not despair over humanity.
Which is why, when it comes to human relationships,
or showing the ugly parts of humanity, or betrayal, or death, he doesn’t feel any hatred.”
“But I don’t feel it’s because Izaya has a strong heart. It’s the opposite, in fact.”
“?” Manami creased her brow.
“He might seem cold-blooded, but he’s more human and his heart more brittle than anyone else.
So much so that if it was filled with human love or betrayal, it’d break easily.
Which is why, I think, he chose from the start to avoid it all, to love humanity.
You understand? Not to accept, not to face it. To avoid it.”
“Yes. It’s something like how a windsock* flies. On first sight mouth wide open, like he’s smiling and accepting everything,
with a huge capacity… But in reality it’s a cylinder with no bottom.
That’s why any amount can go through the mouth.
And he can love anything.” Shinra’s smile never changed,
as he told Manami what he thought of his friend’s character.
“Ah, sorry. Not his true nature; what he hates, was it."
Then Shinra closed his eyes for a moment and sighed lightly, as he said:
"What he hates, would probably be… to feel real pain, or heat, or suffering, I think.”