"And when she's done? What then? Back to murdering every youkai that crosses her path? That sort of hatred is poison to Gensokyo. And believe me, I do understand hatred. My brother's heart was consumed by his hatred; all his life he hated himself, hated his human weaknesses. For 16 years, I lived with that hatred. I was one of the only good spots in his life, but it wasn't enough. Not nearly enough. I saw what that hate, that anger, did to him, to those around him. Hatred is a toxic, hollow thing. It brings nothing but misery to everyone."
Hyozan barks once in agreement.
"And have you considered that she might just be using this as an opportunity to track down bigger targets? Assuming she's able to track down one or more of these sages, what's to stop her from-"
She pauses in mid sentance. It hit her like a bolt of lightning dropped from the sky. Her jaw drops in amazement, then snaps shut, and she smiles. A wry smile at first, but then it spreads into a more genuine one. Like a child who's just figured out a puzzle before him.
"I understand. Now I understand." she whispers, her mind reeling from the thought in her mind. "I'm to stop her."
She walks forward, turning her face away from Laresa and up towards the sky. "That's it, isn't it?" she cries upwards. "That's why it's me, isn't it?! Because I want a world of peaceful coexistence! Because there ARE people like Vaxla, humans that hate youkai like she does. And because there are youkai that feel the same way, that hate humans, that think nothing of their lives. That's what the Hakurei does, isn't it?! She keeps them from killing each other, from everyone around them, keeps the peace in Gensokyo!"
Hyozan takes a half step backwards and tilts his head to the side, and whines once, confusion in his voice. This does nothing to stop Kohaku's rant, though, her eyes positively glow as she shouts her revelation to the world. "That's my dream, my vision! I've believed in it my whole life, and now you want me to make it real!"
She pauses at last and laughs, a joyous sound, the laughter of one that's had the clouds pulled back from her eyes. Heedless of dignity or composure, she drops to her knees right there on the ground. "I finally understand..."