Vampire Hunter D Wiki
General information
Also known as

Final Retrieval Unit






Height: Over 6 Feet?

Weight: ?

Eyes: Dark,
Red (Vampire
Nature Active)

Hair: Long

- Black Servant's
- Black Shoes

Build: ?


Artificial Intelligence


Over 9,000


Frontier Sector


Nobility Retainer
Final Retrieval Unit


Unnamed Father
Unnamed Mother


Duke Sergei V. Sinistre

Powers and Abilities

  • Daywalking
  • Galactic Motion

First Appearance

Bedeviled Stagecoach

Hideyuki Kikuchi
"My name is LUI. I'm the final recovery unit dispatched by Duke Sinistre. From your prospective, dreams are something you have, something you awaken from. But for me, dreams are the true reality―and as a result, when dreaming, you are awake."
LUIBedeviled Stagecoach|[src]]]

LUI is a retainer and final recovery unit in service to Duke Sergei V. Sinistre. He has been tasked with the recovery of Dorleac who has been captured by human government officials and being transported by stagecoach to the Capital. His orders are to take possession of him and bring him back to the Duke. In the event this is not possible he is ordered to activate an Anti-Proton Bomb which is inside him destroying Dorleac and everything with in the blast radius. He makes his appearance in Bedeviled Stagecoach.


In the real world his form is that of a person possiblly that of Dorleac especially since Dorleac B also looks like Dorleac. In the dream world he takes on Dorleac's form.

“One who turns dreams into a battlefield—you’re Sinistre’s final retrieval unit,” D said, finding this neither strange nor frightening. Land, sea, or air——this young man had fought his way through every conceivable arena, and this dream was simply another battlefield.

“Precisely. I have been dubbed LUI.” Dorleac stood up and walked right through the bars. For either he or the bars were a dream. Or perhaps both.

“Even the great D cannot defeat me in this world. In my world, you, too must comply with its rules. As a mere part of the dream.”

“You’re free to inhabit that man and escape,” said D “But he has to awaken from the dream at some point. If he doesn't, Duke Sinistre won’t be happy.”

“Dream or reality—when asked to choose, everyone will choose the dream. No more than a short slumber in your world is an eternity in dreams.”

As soon as D got up, he bounded. Through the blade that split Dorleac’s head, the Hunter certainly felt the skull and brain being cleaved.

Dorleac grinned at him with an utterly unblemished face. The Hunter’s sword swept out so naturally and swiftly and from such an angle it seemed as if it'd never returned, mowing the through man’s neck. His head went flying. D was unable to interrupt its path.

“He sure is a cold one, isn't he?" An unfamiliar voice said from behind her, but Louise didn't turn around. She understood that this was a dream world. But for those who lived in this world----the dreams---everything was entirely real.

"As long as he lives, you can never hold your head up high. You can't live with that kind of humiliation. What do you think you shoud do to make it easy yourself?"

The voice of the device that called itself LUI, like directions from a hypnotist, began to resound with alluring heat in Louise's brain.

"What do you think you should do to make it easy on yourself?" Nothing from Louise.

"What do you think you should do.....

"D, I have already dispatched one last agent for his recovery. If it should decide it will be unable to bring Dorleac back, the agent will at that point activate an explosive device implanted in its body, vaporizing everything in a six-mile radius. It’s an antiproton bomb. And it cannot be stopped now. Out of fear that I might change my mind, I equipped it with an absolute trigger system. The only thing that can halt it is Dorleac’s safe return.

However, I would hardly call this perfect. D, you may laugh at me and call me pathetic if you like. You see, I changed my mind. And not ten’ minutes after sending off my final agent. I wish to see Dorleac alive once again. Would you not dispose of the retrieval agent for me?"

Duke Sergei V. SinistreBedeviled Stagecoach|[src]]]


As part machine, the LUI's personality is programed with what you would expect in artificial intelligence such as unyielding need to carry out its orders as laid out to the letter, high analytical processing speed, nearly unaffected by failure or being impeded, an artificial will that can not be exhausted, no emotion one way or another about its orders or what it has to do to achieve them, and many others.

It does have unique emotions and personality traits of its own such as a seething underlining anger at all times and blood lust, enjoyment in violence and killing, highly developed sense of imagination, strong sense of empathy, high emotional intelligence, high ability to manipulate others successfully with words which it follows up with its powers, and many other traits. It seems to have high confidence in its ability that goes way beyond programing, though, this is a trait common in powerful vampires in the Nobility.

It can mimic the personality of those around it especially if it decides to take their form perfectly. Which makes it highly adaptable. It has intimate knowledge of the workings of its powers and seems to constantly challenge itself to find new ways to use them effectively to get its objectives completed. It being a unique being having artificial intelligence housed inside a biological Greater Noble, along with that body also being artificially made and modified with powers to warp dreams/reality give it a unique personality blending together these properties to used them affectively, along with surprising introspection into the nature of those powers. Believing the real world to feel as though it is a dream and the dream world more real to it.


Powers and Abilities[]




Antiproton Bomb