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Did you think that a display of force would be enough to overwhelm me? How foolish. In fact, I would say that the very concept of 'power' itself is different for me than for you. Allow me to demonstrate. This is the true meaning of 'power'.
~ Dark Maria Arusu abou to Kill Shidou and destroy the universe

Unknown or also called Marina Arusu is the main antagonist of the game Date A Live Ars Install. She is a Irregular spirit and the evil-twin of Maria Arusu. She is a demon artifical create by Isaac Ray Peram Westcott and Ellen Mira Mathers. She is also the final boss of the story mode of the game.


Marina Arusu also has some features of her predecessor, the only thing that changes is her clothes color and the color of her hair, skin and eyes. She seems like to be a teenage girl with 15 Year old. She is not a very tall or small girl, her eyes are very bright yellow, their hair are so black that glow as if they were violet, as well as theDark Tohka the tip of his hair are white, she has a very white skin to the point of almost look pale.

She wears a similar dress of a nun astral, it is black with some dark yellow stripes forming a shape of a cross in front of her dress, the dress has some torn part down, her dress are dropping some sparks as if they were something of hologram, she also wears a white bandana with some black stripes on her head, she is a bit similar to Kurumi, she wears stockings that cover most of her legs with a pair of black high-heeled shoes.


She has shown to be a little bit harsh and mean, as she always removes NPCs that are in her way without much thought. But as the time went, she began to show a sign that "she’s beginning to change" by helping an elderly NPC in the street. In the true ending, Shido gives her a meat bun in a park at night, and at the other time, pats her head as a reward.


Marina is an artificial Spirit created by Deus.Ex.Machina Industries and originally sent to take control of Fraxinus. She gets trapped in the game world and is waiting for Maria to weaken so she could take over Maria's "authority". She keeps watching as Maria keeps resetting the world to learn about love.

She does manage to take 90% of the authority after Shido finally kisses Maria. She then takes control of Fraxinus, charges the main cannon and prepares to shoot at Tenguu City. She is in the "Mother Room" and Shido and the others head towards her. Marina makes multiple copies of herself so that the Spirits will fight against them while Shido and Maria goes to the Mother Room. In the Mother Room, Marina pretends to make friend with Maria and then takes the last 10% of her authority. She is then being able to transform into her Spirit form. She keeps attacking while Shido uses the Spirits’ powers to protect Maria. Maria then prays for power to help Shido and somehow Maria is able transform into her Spirit form as well, also getting back some of the authority. Shido then defeats Marina with Maria’s help.


Fraxinus falling

Marina’s astral dress then goes wild and becomes a giant black ball that quickly regenerates when attacked. It also causes a problem at the outside as Fraxinus is now losing flight power and slowly falling toward Tenguu city. Maria then goes on ahead as she is the only one that can enter inside the ball. Moments later, the other Spirits arrive and they destroy the ball together. Shido then rushes towards where Maria and Marina are. In the meantime, Maria and Marina share each other’s memories and "understand each other". When Shido arrives, both Maria and Marina wish for Shido to kill them so that Fraxinus can fully restart, preventing it from falling towards Tenguu city and kills many people. After much resistance, Shido finally uses Sandalphon to break Marina’s crystal and thus she dies. After Maria disappears, Shido and the others then are able to get back to the real world as the crisis is already over.

In the true ending, it is revealed that Marina performed good deeds before her demise. She sent Maria"s mail message to Shido’s phone (in which Maria thought would be unreachable), and even installed Maria onto his phone.


  • Hacked system
  • Virus Mode
  • Dark Maria Arusu Devil Form

Angel: Unknown

Astrall Dress: Unnamed

Weapons: None

She proved to have few skills in the game but she showed that she has the ability to multiply herself.

Musical Theme

Date A Live Ars Install OST - Marina Arusu - Worry01:22

Date A Live Ars Install OST - Marina Arusu - Worry



  • Anyone know the name of the inverse form of Maria Arusu, the trailer of the game's name was seen as: ??????.
  • Dark Maria Arusu is similar to skynet virus, both are a creation of evil in the form of a virus.
           Date A Live Villains

Yoshinon | Kurumi Tokisaki | Kurumi Tokisaki Clone | Kotori Itsuka | Miku Izayoi | Natsumi | Origami Tobiichi | Rinne Sonogami | First Spirit | Phantom | Nia Honjou

Spirits Inverse Form
Dark Tohka | Dark Origami | Dark Nia

Zadkiel | Gabriel | Metatron | Camael | Zafkiel | Nehemah | Eden | Kerubiel

Demon Kings

Deus.Ex.Machina Industries
Isaac Ray Peram Westcott | Ellen Mira Mathers | Roger Murdoch | James A. Paddington | Captain Reys | Jessica Bailey | Mildred F. Fujimura | Edgar F. Caroll | Russell | Arbatel Pilots | Ashcroft Assembly | Andrew Kersee Dunstan Francis Barbirolli | Material A | Artemisia Bell Ashcroft | Neryl Island Westcott Organization

DEM Industries Board of Members
Roger Murdoch | Russell | Simpson

Kotori Itsuka | Kyouhei Kannazuki

Anti Spirit Team
Ryouko Kusakabe | Origami Tobiichi | Mana Takamiya | Tomonara | Kagaya | Morie

Special Sorcery Service
Minerva Liddell | Artemisia Bell Ashcroft | Ashley Sinclair | Cecil O'Brien | Leonora Sears

Okamine Heavy Industries
Torataro Okamine

Charllote Meyers | Izabell | Daisy

Robots and Machines
Bandersnatch Drone | Bandersnatch Droid DD007 | Satellite Humpty Dumpty

Video Game Exclusive
Rinne Sonogami | Marina Arusu

Other Antagonists
Corrupted Shido Itsuka | The Abusers | Kidnnapers | Hotshot TV Producer | The Offenders | Woman | The Dark Guardian | DEM Industry Alpha Team of Japan Branch | Anti-Isaac Faction | Japan Ground Self-Defense Force