- Genkai: [to herself] Ah, Koenma better come soon. If I keep sitting with these kids I'll find a new use for my Spirit Wave.
- Ogre: You'll come back soon, sir, right? I think our dynamic was really improving.
- Koenma: Ogre, you're a fruitcake.
- Ogre: But what should I tell your father if he returns?
- Koenma: YOU think of something. YOU'RE big and blue.
- Ogre: [whining] But Jorge wants to go with you.
- Koenma: Jorge stands out in the human world like a heifer in a beauty pageant.
- [Ogre instantly dons a trench coat, hat and sunglasses]
- Ogre: How 'bout now?
- Koenma: Now you look like you're gonna flash somebody.
- Koenma: You take care of things back here and hopefully I'll have a home to come back to.
- Ogre: Oh, sir, please be careful. All those times I hated you I only half meant it.
- Koenma: Likewise... sort of.
- Kurama: [referring to Sensui] I know you must have taken great care to commission him as Spirit Detective, Koenma. How did he turn from humanity's protector to its greatest threat.
- Koenma: [about Sensui] His universe was cut and dry, black and white, demons were evil so he had to destroy them. And that's when he saw what changed him.
- Kurama: What was it?
- Koenma: Gray. Truckloads of gray. I'd given him an urgent case... if only I'd known the results.
- Kazuma Kuwabara: What kind of case.
- Koenma: I had ordered him to seal up the tunnel between the human and the demon world.
- Yusuke Urameshi: What?
- Kazuma Kuwabara: You mean it's the exact same thing we're doin' now?
- Koenma: The circumstances were different.
- Kazuma Kuwabara: Really? How?
- Koenma: That opening was only ten meters wide. There was no threat of expansion, but it was stable, allowing lower class demons to pass. It took eight psychics, the strongest they thought existed, to maintain it, but it wasn't free passage for the demons. It was a trap organized by the young Black Black Club. They captured demons as they squeezed through and sold them at enormous profit.
- Yusuke Urameshi: Black Black Club rings a few bells.
- Kazuma Kuwabara: D'hose are the dirt bags who watched us while we rescued Yukina.
- Koenma: That's right, and one up-and-comer had just worked his way into the group by his talent at capturing demons - Sakyo.
- Kurama: Quite the turn.
- Yusuke Urameshi: Sakyo? You mean he was already startin' stuff while I was gettin' kicked out of kindergarten?
- Koenma: One way to look at it, yeah. Today there's an entire culture of demon bodyguards for corporate crooks. A multi-billion black market industry. Sakyo began it all.
- [Sensui saw something he never should have seen. Koenma explains]
- Koenma: A ritualistic party they called The Feast of Human Vices. These privileged humans were toying with the demons they'd ensnared, torturing them with no motivation other than their own twisted pleasure. Sensui had sworn his life to protecting his race from demons but, here, humans were enacting cruelties a thousand times worse than anything he'd seen from demons. Black and white blurred, flipped upside-down. His mind wasn't big enough to hold the change. Sensui lived his life on the straight and narrow, but what he saw that night went against everything he knew the world to be.
- Kazuma Kuwabara: A lot like we felt when we went to Tarukane's place and saw what they were doing to Yukina.
- Yusuke Urameshi: Yeah, you're right.
- Koenma: But there is a most important difference between your reaction and his. There, in that room, Sensui fell into a rage and murdered every human at that feast.
- Yusuke Urameshi: See, that's why I'm always half-assed, grandma: Never take yourself too seriously and you won't turn into a freakin' fanatic.
- Koenma: Precisely why I chose you after Sensui failed. I wanted someone who wouldn't think too much.
- Kurama: [struck by the logic of it] Yes! Of course!
- Yusuke Urameshi: Don't be too quick to defend me, pal!
- Kurama: Sorry.
- Sensui Shinobu: I was counting on your weakness, Seaman, as well as your betrayal. I've heard every word you've spoken, and now that you've served your purpose you can die with the humans you couldn't detach yourself from.
- [Kuwabara goes charging out after Sensui]
- Yusuke Urameshi: Wait, you idiot! Haven't you learned? You're like an ugly singer with a good voice - best for back-up.
- [Standing together in their first group face-off against Sensui Shinobu]
- Kazuma Kuwabara: Okay. I'm takin' this one.
- Yusuke Urameshi: Don't be a moron. You'll play it like I tell you.
- Kazuma Kuwabara: Did you hear what I said?
- Kurama: Beating Seaman was a brave feat, but you're injured and in no shape to fight.
- Genkai: He's right.
- [Kuwabara spits in disgust]
- Koenma: Keep your distance, Yusuke. It's no cakewalk for you, either. I started him off, too. He can store up his Spirit Energy and fire it just like you.
- Kazuma Kuwabara: So 'im and Urameshi have the same technique?
- Genkai: How strong's his power?
- Koenma: Can't say. We don't know WHAT he's learned in the last ten years.
- Kurama: Then any initial contact will be a gamble.
- Kazuma Kuwabara: Are you listenin' to all this, Urameshi?
- Yusuke Urameshi: Hm. Sounds like fun.
- Koenma: Go easy.
- Kazuma Kuwabara: [bitterly] Naw... Guess when you become a champ you get to do all the cool stuff.