"You should have learned by now this is a kill or be killed world. If you're too weak to help yourself, you deserve to fall."
"Does a death wish cause you to speak to me that way?"
"My Jagan Eye may not be natural but it gives me exactly what I need."
"I believe these demons are technically classified as weak and ugly."
"What, I'm not even allowed to kill the bad humans?"
"This wind coming in feels like home. It's comforting and it soothes me. It tastes like freshly spilled blood and the rotting flesh of decaying corpses."
"Maybe we should kill Kuwabara again."
"Even as a child, I found tremendous pleasure in spilling my enemy's blood. Their screams of agony were my music box."
"The only thing that I have earned in this life is death. And I gladly welcome it now."
"My curse, to be born with a nature in direct opposition to my breed with no choice but to consume everything around me with the flames of my hate."
"If you have any noble plans to stop me, I suggest you write your will."
"There is no one who does not carry scars on his heart. If there was someone in the world like that, he would be a shallow soul."
"True pain takes time, my friend."
"Death will come long before surrender."
"I'm surrounded by idiots, but they mean well."
"You do them one favor and then they think you're their best friend. This is why I could care less if their whole species was swallowed up."
"So tell me, what's it like living in a constant haze of stupidity?"
"I know as much of games as I do of hugs or puppies and care for them even less. Wake me for the end of the world."
"Lover-boy. Release us now and you can keep your ability to breed."
"You already have your fox, your clown, and your hag; I'm a moot point."
"You should have never insulted the Jagan eye, because you see, in a way it has it's own mind and loathes disrespect. Resisting it is not something I would do."
"I am a rogue and a convicted criminal. Even you have had to come and capture me... do you think she'd be happy to know that her long-lost brother is a felon? It's best to watch her from a distance."
"Listen to me as closely as you can, you two. I'm trusting you against my better instincts only because I have no other choice. Take care of the Toguro brothers. If I wake up... and we've lost I... swear I'll kill... you... all!"
"So this is the entrance to hell. It's drearier than I imagined."
"I’ve been under too much stress lately. Killing you should get a good remedy."
"I may be a small target, but this is just sad."
"Just what is that ridiculous appendage growing out of your head?" - (Asking Yusuke about Puu.)
"You're a team player, a save-the-day superhero. I hate people like you." - (Hiei to Yusuke in their first encounter.)
"Do you think he knows it's a circle?" - (About Kuwabara, who was running around a circular tower.)
"I have never before or have since experienced the level of flesh searing pain that was inflicted on me that time." - (Hiei on what is was like getting the Jagan Eye.)
"Hate to say it but that is hardly hygienic. You have no idea how many creatures that sword has cut through." - (Hiei to Momotara after Momotara licked Hiei's sword.)
"I had no idea that you were one of us. How does it feel to be so superior?" - (Hiei on finding out that Yusuke is a demon.)
"So even someone as calm as you occasionally gets angry. Hn, that's good to know." - (To Kurama.)
"He has no strategy. He's just swinging his sword with the grace of a flyswatter! That's no way to survive." - (About Kuwabara.)
"Go ahead. Tell them I'm her brother. I'll enjoy torturing you to death!" - (Telepathically to Botan, when she almost slips up and tells Kuwabara about Yukina being Hiei's sister.)
"I am fighting without purpose, falling back into a life of meaningless killing, a life of dishonor and cowardice. There is no dignity in this sort of existence. So I must find honor in death." - (Hiei on being forced to fight Shigure.)
"I hate to use this attack. I find it totally devoid of taste or artistry." - (Hiei on his Sword of the Darkness Flame attack.)
"Countless centuries, countless masters have been trying to harness the power of the Darkness Flame. But only I have had the courage, the strength and the abandon to realize its glorious potential. I have the power of the Black Dragon because now I AM the Dragon." - (Hiei on finally managing to do what no one else before has done, trap the dragon within his own body.)
"At last I return to the world where I belong, my home. There's is just one thing that I didn't miss about the land of apparitions: being hunted by ghosts from my past. And unlike in the death-defying battles that Ive become accustomed to, there's no escape in sight. The memories assault my senses when I'm at my most vulnerable. So if you're feeling particularly sadistic, then by all means, please join in my personal nightmare, on the next Yu Yu Hakusho." - (Hiei's second prologue-- not actually in the show :p )
Kuwabara: "I have the feeling that I'll win!"
Hiei: "And I have the feeling that you'll die..."
Yusuke: "Well, what are we waiting for?!"
Hiei: "You to stop talking."
Kuwabara: "You wanna die?!"
Hiei: "I dare you."
Hiei: "How touching..."
Kuwabara: "Bite my ankles, Shorty! I swear I'll make you cry to your mom! If you have a mom, that is."
Kurama: "And to think, one day they could be in-laws..."
Kuwabara: "We don't know squat about that guy! What if he loses and we get booted from the Tournament?!"
Hiei: "If that happens, all we have to do is kill everyone else on the boat before we reach the island. We'll say we're the right team and no one will complain."
Kuwabara: "You didn't have many friends growing up, did you...?"
Kurama: "Come, join us Hiei. We're practically a family!" - (Asking him to play cards with the others.)
Hiei: "Kurama! Don't make me tear out your precious voice box!"
Hiei: "I can't just watch you be killed right in front of me."
Kurama: "Okay then... go somewhere else."
Hiei: "Set your eyes on the second floor window. That is your door."
Yusuke: "Well, I'm sorry Mr. Mysterious, but I forgot my pogo stick."
Yusuke: "I told everyone you'd come back for us when we needed you the most you big softie. Or should I say little softie?"
Hiei: "I should have slit your throat when I had the chance."
Kuwabara: "Ew! Ew! What the heck happened to your arm?!"