- Itsuki: At every moral crisis that stood in the way of Sensui's plan, a new personality would be forged to do the work. It solved the paradox of how one can punish if doing so requires you to commit the very same sins. This way his core soul could remain morally undefiled. Of the seven personalities, one of them is a girl. She has a beautiful mind capable of the most delicate and loving thoughts and poetry that I've ever heard spoken. She would talk to me in the dead of night, always crying, venting sorrows that, if not expressed, would have killed Sensui from a broken heart. Besides Shinobu, I favor her the most. Sometimes I think we're in love.
- Koenma: [thinking] If only I could rearrange the gears turning in your head! I don't want to use this on you! Please, return to the Sensui you were!
- [in flashback]
- Koenma: If there has ever been a human destined to be Spirit Detective, it was you. You were born with incredible powers, and an obsession for making things right and just. It was my fault; I was too eager to close the case. How could I not have known how you would react, when you saw the darkest vices of man? When you realized that your life's work of protecting humans from demons was not a crusade of pure justice, but a study in gray?
- Shinobu Sensui: [in flashback] It is a war waged against evil, yet the evil is within. How else can I justify what I've done, but to continue? Then shouldn't all humans die?
- Koenma: But there has never been a light that did not cast a shadow. Darkness, by its nature, must always be entwined with good. I must take the burden for what you are now. I exposed you to that truth your idealistic mind can't understand. So, if you continue this battle for unearthly principles - if that's what you decide - then I will go with you. I'll trap myself in the net with you, share the pain of being trapped without movement for eternity. It's the least I can do.
- [aloud]
- Koenma: Please, Shinobu, come around!
- Shinobu Sensui: [as Kazuya] Huh! I didn't realize you still had so much energy left. You nearly caught me by surprise.
- Yusuke Urameshi: Yeah? Well, imagine MY surprise, pal. I had a whole mental picture of what you'd look like as a heap of charcoal. The look really suited you, too.
- Kurama: We assumed Sensui cared for his team but, in truth, "the seven" were his own personalities.
- Hiei: The psychics were expendable. He planned to be the sole survivor from the start.
- Itsuki: That's correct. As his partner from the naive years, I'm the only one who realized - but I can take care of myself.
- Narrator: The Mafukan, also known as The Conscious Ring or The Wicked Seal. When fully powered it is the strongest defensive spell in all of Spirit World. For centuries, Koenma has transferred his Spirit Energy into his pacifier, the vehicle for his Mafukan spell - a precaution for darker times. When released, the Mafukan will create a Kekkai Barrier Net to ensnare the encroaching enemy. Far more powerful than the Kekkai between worlds, it specializes on demons, and can even trap the S-class with ease.
- Yusuke Urameshi: [to Sensui] Don't bother with the bull. Let's just get back to killing each other.
- Koenma: [to Yusuke] Don't be ridiculous. You're no match for 'im. Give me back the Mafukan, NOW!
- [They struggle over the pacifier]
- Yusuke Urameshi: I'm trying to do this the nice way.
- Koenma: And what's the alternative? You gonna tie me up with your shirt?
- Yusuke Urameshi: Not exactly. Actually, it goes a little something like this.
- [Yusuke K.O's Koenma]
- Yusuke Urameshi: You've NO idea how long I've waited to do that.
- Shinobu Sensui: My name is Shinobu. It's an honor to meet you.
- Kiyoshi Mitarai a.k.a. Seaman: That's so weird. I've never seen Mr. Sensui like this.
- Kurama: Yes, his continence has changed from before. I dare say he sounds innocent.
- Itsuki: It's because he is. In his reality, Shinobu has never committed a crime. He knows his other sides have done wrong, but he's separated from it, able to blame them and grieve for what they've done while realizing it's necessary. Such a complex side, I guess that's why I like HIM the most.
- Yusuke Urameshi: [as the show's closing narrator] Two words: Holy Crap! I've been calling Sensui's secret a "curveball" but "canonball's" more like it. And while the cave sides are giving me deep tissue back rubs, Koenma's powering up in ways we've never seen, determined to unleash this Mafukan and spend the rest of eternity trapped with Sensui, but I won't let that happen. So while my team's stuck in a ghost's stomach and thousands of demons count down to an all-you-can-eat dinner at the human buffet, I'm gonna show you moves you've never seen...
- Koenma: If I engage this Mafuken, it will first seal the precious tunnel that you've poured your life into creating. Then I'll trap you inside the net, and you'll never move again. I've kept this thing between my teeth for most of my existence, giving it my spirit energy. It was for humanity's next dark day in a few hundred years, yet you give me no choice but to use it now.
- Shinobu Sensui: Well, you're just as stupid as Shinobu says. You can't use that fancy weapon on little old us! Who's going to save the humans in that supposed dark time now?
- Koenma: We must handle each new dilemma as it comes to us. If your plan is allowed to continue, in a few hundred years there will be nothing left to save. This way, your conspiracy will end. You're finished, Sensui, unless you plan to kill me.
- Shinobu Sensui: My, my, you really ain't screwin' around!
- Koenma: You should consult with your other sides. Are you really ready to be damned? Because surrender and torment are your only choices.