Ninatsu Satake

**Ninatsu Satake** is the main protagonist of *A Certain Scientific Gravitator*. He is a Level 4 Esper and former Child Error of the Dark May Project, and former member of Hound Dog, a unit led by Kihara Amata.

He is the guardian of the artificial child, SHIRO.

## Appearance

Ninatsu takes the appearance of a young teenage boy. He wears an unbuttoned school uniform with white collar, blue running shoes. Underneath all of those, he wears a black and gray infiltration suit with a high powered exoskeleton attached to it.

His left eye is artificial due to an experiment accident involving him and Kuroyou Umidori.

## Personality

Initially, Ninatsu gives the impression of being a very serious and superstitious young boy, very ruthless when it comes completing his objectives. He was loyal to Kihara Amata, despite the commander's disrespecting attitude toward him. Due to the Dark May Project implementing his brain with Accelerator's thought patterns, a part of his personality may bare some resemblances.

However, he is subject to growing attachments to most of his allies and has an incredibly sympathetic, caring and protective side. This is shown in many ways such as when he betrayed Hound Dog to prevent SHIRO from being killed. He cared greatly for the well being for his fellow subjects during the Dark May Project, having memorized all of their names, and still caring about Umidori even after the incident with his eye.

## Background

Ninatsu was a Child Error of Academy City, and was soon picked up by scientists of the Dark May Project, a project that aimed to replicate the abilities of the Number 1 Esper, Accelerator, becoming one of the top Espers of the experiment, alongside Kinuhata Saiai.

During his time with the project, he developed his Gravitator ability which allowed him to manipulate gravity, veering close to a part of Accelerator's Vector Manipulation, which made liable for Level 5. They ended up sticking down to Level 4 as he couldn't alter the impact of objects, and the loss of his eye left him with some trauma which affected the speed at which he could calculate.

After Umidori ended up killing most of the scientists, bankrupting the project causing it to be abandoned, Kihara Amata decided to continue making use of Ninatsu and inducted him into his black operations unit, Hound Dog and was given the code name "Logan" where he stood as the youngest, yet toughest member.

He's also enrolled in Nagatenjouki Academy.

## Chronology

### The Child Arc

On September 17, Ninatsu is first introduced as a passenger along side other Hound Dog operatives in a black tinted SUV. They were pulling up to a sealed facility having been sent here to investigate an unknown experiment which was being taken place. One of the Hound Dogs with a laptop camera of a drone which displayed the outlines of the individuals inside the building.

Ninatsu exits the SUV with two other operatives and nears one of the doorways, using his Gravitator to crush it together into a small sphere and throw it to the side allowing them to enter. Inside the facility, are other armed mercenaries from another unknown organization. Ninatsu and the operatives make short work of them before entering a research room and apprehending the scientists. Ninatsu interrogates the scientists himself, but they talk down to him due to his age. Ninatsu grows impatient and throws one of them near one of the glass chambers, frightening the other one. Ninatsu grabs a document and reads it, uncovering the main facility of the location and name being "Project SHIRO," which aimed to use a small child, forcefully growing it's abilities at a young age to achieve a Level 6 Esper, and the location of the main facility.

Ninatsu contacts Amata over an earpiece and informs him that they got what they came for. The Hound Dogs execute the captured scientists to keep their presence covert. As they exit one of the Hound Dogs refers to Ninatsu by his real name instead of "Logan" and due to his superstition, Ninatsu knocks him to the ground and scolds him, telling him that they were given code names for a reason and anything they do can mess up their cover. The operative frantically nods in acknowledgement before they leave the scene.

They return to a large skyscraper, being Hound Dogs main headquarters and Ninatsu debriefs with Amata, though Amata doesn't display much respect for Ninatsu's loyalty and simply brushes all of "uninteresting bits". Ninatsu informs him of the project and Amata finally displays some levels of interest, questioning why people are still trying to achieve Level 6 after all that has happened. Amata then puts Ninatsu in charge of going to that facility and shutting the project down by force, either by killing the main subject or by other means.

Ninatsu complies and rallies three other operatives to head out.

They approach the facility all on foot, surveying the area and spotting multiple security robots, however these individuals were unlike the human ones, they were humanoid and equipped with assault rifles. Ninatsu questions how these scientists managed to get their hands on such technology before making up a plan.

He uses his Gravitator to fly down into the middle of the entrance, surrounding himself, and taps the ground to create a field and cause the robots to the float around, making them lose hold of their rifles. Ninatsu taps the ground again and the bots began to fly and crush into each other, displaying his gravitational abilities.

The Hound Dogs dispatch the remaining robots before they head near the front door. Ninatsu and one other Hound Dog, code named "Bear" enter the facility, leaving the last two outside. The two move through the facility maneuvering through the scientists and security stealthily. Ninatsu enters a room and knocks a scientist unconscious with his pistol, before looking over a large cylinder chamber.

Bear activates the door over it and opens the chamber in which the main subject is revealed.

Ninatsu stops, staring at the subject with dismayed eyes, and holds his head as his trauma from the Dark May Project begins to seep back into his memories. It was a small white-haired girl, about 1-2 years old. There was small black writing on her cheek, which said "203". Bear raised his rifle at it, getting ready to fire, however Ninatsu stopped him, stating that they were taking her alive. The Hound Dog resists and explains that they were ordered specifically to kill it.

After that, Bear aims and a gunshot rings through the room. Bear drops to the ground, clutching his gut which was bleeding, having been shot by Ninatsu. Bear dies as Ninatsu holsters his pistol and held out his hand, and in response, the child, known as SHIRO stuck out her own and held his finger and coos in a small sign of admiration.

The Hound Dogs outside question Ninatsu about the child, one of the female operatives expressing adoration for it. Ninatsu ignores them and the operatives return back to Amata's building. Upon seeing the child, Amata grows rather curious, poking at it's head roughly much to Ninatsu's dismay. Amata then orders the child to be taken into another room. SHIRO cries out in fear, staring Ninatsu with begging eyes. Amata thanks Ninatsu for bringing this subject to his attention and gives him a "day off," letting him have some time to himself around Academy City. Ninatsu complies hesitantly, knowing what Amata does to people he wants to "test" but leaves the building anyways, wandering around the streets of Academy City. He sits down in front of a small shop where he reminisces about his past in the Dark May Project, remembering the incidents that took place. He remembered an incident in where a girl named Tomoka was killed after an experiment to implement Accelerator's attachment into another girl. Ninatsu flips a gravity altered coin and sends it flying across the street. He questions if whether or not Accelerator's thought patterns had somehow made him already grow attachment to SHIRO after having only just met her. He stands up, and goes near a vending machine where he angrily punches it and damages some of the glass.

He is then stopped by the Judgement member, Uiharu Kazari, who scolds him for property damage and asks about his well-being. Ninatsu responds blatantly, stating that he was fine but Uiharu persisted. Ninatsu explained to her some vague details about his dilemma with SHIRO, and asks for some advice. Uiharu then tells Ninatsu that he should always choose the right thing, before apologizing if that sounded childish. Ninatsu then brushed it off, stating that it didn't before standing up and thanking Uiharu before walking in the direction of the Hound Dog headquarters. Ninatsu questions what he's been doing with Amata up until that point, and states that he was done being his guinea pig, returning to the building to make amends for leaving that child with him.

Ninatsu, with a now change of heart, returns to the building with force, killing most of the Hound Dog guards inside. He enters the room where SHIRO was being kept and unstrapped her, sparing a cowering female Hound Dog, which was the same one that displayed adoration for the child and claimed to have stood up for it. Ninatsu took SHIRO and made his way out of the building, killing and incapacitating more Hound Dogs either with his pistol or with Gravitator. When four Hound Dogs surrounded him he tilted gravity and caused them to fly up and hit the ceiling which immobilized them and allowed for Ninatsu to escape safely with SHIRO, stating that he'll keep her safe from there on out and that he'll no longer stand and watch people die. He heads out into the night, with SHIRO safe in his arms.

## Abilities

### Gravitator

Ninatsu Satake's ability is known as Gravitator. As Level 4, Gravitator allows Ninatsu to manipulate the gravity around him at advanced levels which make him a top candidate for 8th ranked Level 5. He can increase and decrease the gravity around him and whatever he touches, letting himself fly in the air, or propel objects, control the gravity of an individual person. He can tilt gravity and throw targets upward, and even immobilize/crush targets by increasing their gravity and sticking them to the ground. This ability was the result of the experimentation done to him during the Dark May Project, having had Accelerator's thought patterns inserted into his brain. He received an ability which was bared some similarity's to Accelerator's Vector Manipulation, such as the ability to direct objects around. With this ability, Ninatsu can also amplify his strength by surrounding himself in a gravitational field, giving him tactile telekinesis.

When he thought SHIRO was killed during a skirmish, he created a black hole out of rage which destroyed the surrounding area greatly.

However, unlike Accelerator, he is still liable to being hit by fast moving objects such as projectiles from firearms, and due to his past injuries, his calculation ability is slow, and he may need a few more seconds to think before he can do anything with his power.

### Other Abilities

Ninatsu is very skilled in hand-to-hand combat and marksmanship. Being able to shoot a target while in a moving vehicle and able to pin Umidori to the ground during their encounter. The high powered exosuit he wears underneath his clothes allows him to draw out greater speeds and strength.