(I know Osiris belongs to the Terumverse, but I just want to bring the usual version back in this FGoD Multiverse, as well as use a transformation and the transformation's powers from the Staffverse, if that is okay.)

Nicknames:

The MainFrame Beast
The MainFrame Demon

Date of Birth:

Place of Birth: MainFrame

Species: MainFrame Being
Gender: Male
Height: 14'3
Weight: 720 Ibs

Oh, everyone was born to die.-Osiris

Osiris was originally another personality in Error404. But Osiris describes it as like a prison. He couldn't get out of Error404's consciousness. However, something happened that Osiris was finally able to escape.

Backstory:

Prior to the formation of Error404, William always had some kind of stress relief method. This stress relief was in the form of an unknown existence, and he always put his dark thoughts in it. Whenever William was upset, he preferred to assign his feelings to this being and hide everything he was upset. This was deeply engraved in his soul and was regarded as a completely different existence. Every time William goes into the MainFrame, the MainFrame registered this other personality as a completely different existence. This led to the creation of Osiris.

Appearance:

In the MainFrame, Osiris wore clothes similar to those of Just404, the form that controls William's body. With black and blue stripes, it looks stylish. However, with each release from MainFrame, his outfit changed drastically. A black coat up to the ankles, a strand of hair along the contours, and a coat around the neck. When damage is inflicted on the coat, blue runes appear momentarily depending on its strength.

He has jet-black skin and blue eyes, and the left one emits white light, acting like a lighthouse. Sometimes it flickers. The lips are pitch black, and they can also hide their teeth, but they accumulate saliva, so he does not like them. If he hide his teeth with his lips, only your eyes are visible. The teeth range from human to hybrid-sharp ones.

Emperor Osiris: Osiris realizes that from an eternity in MainFrame that he has the ability to withstand the void. This led him to wear a new guise. He still likes it, but it has a strong connotation purely as an ornament. The same coat, but the fur is trimmed and refined with thin blue lines instead. The face has 7 rows of teeth, making it more deformed. The shirt is standard black with a neon blue X in the center. Lunic glyphs are all over his coat.

Personality

There is no doubt that Osiris is clearly a stranger to life. He is cold, deceives and manipulates people. Osiris prefers what is under his control, even if he is not interested in a direct situation. Freed from MainFrame, he was surprisingly indifferent to everyday things. He's been trapped in a cold MainFrame since he was born, so when he's in a quiet and cold situation, he develop a strange form of PTSD. He feels a platonic charm for innocent people, but he has a cold attitude towards sinful people. He has a formal attitude and looks like a good person. He always speaks elegantly, is fair and calm, and doesn't forgive anything, and seems to be a really good person.

Except he's not.

Osiris' true intention is something you will never know unless you die. Behind the elegant and happy attitude, there is a sociopathic monster lurking within that deserves to treat the lives of those who have committed crimes like an epidemic and erase them. He thinks of himself as a soap to clean up the dirty table in the multiverse. But strangely, you can persuade him to do disgraceful acts. Just really, be careful.

Powers and Abilities

Limb Transfer: Osiris can gain power from bus limbs and transfer them to other limbs. For example, Osiris can transfer his leg strength to his arms. In this case, the power of the punch is quadrupled, but the leg strength is quartered.

Cosmic Activation: This mode can be selected. In this mode, the attack does not cause damage until you choose to do so. 50 punches can hit at once and shatter an opponent, thus inflicting extremely fatal damage.

The Bite: It can consume people with its very sharp teeth and transform into the person he had bitten.

Anti God Ray: A black beam with a blue outline can be fired as a laser. It is completely harmless to living things (people, plants, etc.), but completely erases non-living things like butter (e.g. making buildings collapse very easily).

Cosmic Alternation: Osiris can change gravity to a certain extent, instantly creating violent thunderstorms in arid deserts or winds powerful enough to push buildings.

MainFrame Calling: From the MainFrame, Osiris can summons a large hand the size of a house to underground chunks, he can cast a variety of super-sized moves and attack with a single blow.

Determination Swipe: The hand glows a deep red, the blue pattern turns red, and a big swipe that obliterates everything in the path up to 500 meters. It can't be blocked, but it can dodged because it moves 1 meters per second.

Mind Warp: Osiris can make his opponent forget how they fight, who they are fighting, and other non-living things.

Coded Traveling: Osiris can move freely within the encrypted area. It is a type of teleportation.

Chain Manipulation: Osiris can manipulate the chains around his arms and do whatever he wants, as long as the chains are capable.

MainFrame Reality: The most powerful ability of Osiris. Osiris can send creatures within a 1km radius into the other world of MainFrame, where everything is dark and dim, and the only light is the dark blue sun. This is a completely parallel world to the real world, but the events that occur in this world do not affect the real world. In this world, Osiris has complete control over everything except the people he sends in. If he were to murder them in this world, they would lose all of their real-world magic supply and carry the Lunic Glyph engraved on their arms. After being carved into 9 pieces, the victim dies permanently in Mainflame Reality.

Weaknesses:

Mind warp: When warping other people's minds, Osiris will not be able to use any magic. To use magic, Osiris has to restore your opponent's memory.

Determination: Each time Osiris uses the Determination Swipe, he becomes amalgamated until the skin is repaired.

Frigid phobia: Extreme cryophobia.

Transformations:

D.E.L.T.A.R.U.N.E: D.E.L.T.A.R.U.N.E is the one and only form of Osiris. Only in the reality of MainFrame opens up this form, but gives it real power to dominate reality.

He has complete control over reality in this form, but due to the way it is bound only to MainFrame, this gives him the power to have complete control over MainFrame's reality. However, we cannot control the entity within it. "Logic," "reality," and "concept" are all just words that he can distort in this form.

Cyberware: This form is the result of Malware taking over the body of Osiris and use him as a vessel whenever Error404 enters the MainFrame. Cyberware's appearance is rather bizarre, for he doesn't exactly wear any clothing, rather he is tripedal. On his skull are 5 Eyes, two on both sides of the skull, and one within his mouth. Most of Cyberwares joints aren't connected, rather they float a bit away from his body, yet still functional. The personality of Cyberware is that he is very dangerous and fearsome, combining the cruel sadism of Osiris towards the sinful and the violent remorseless nature of Malware, with their might combined to show how utterly dangerous that Cyberware is to those fighting against him.

Infectious virus: Cyberware is able to infect anything he touches up to a microscopic scale, essentially making said infected object/person apart of Cyberware

Decay ray: Cyberware is able to fire a beam straight from the eye within his mouth, this beam is able to decay the environment, and even decompose living people at a fast rate until their organs eventually fail, killing the opponent

Eyes of malware: Cyberware is unable to be killed, unless all of his eyes were to be destroyed

Limb creation/distribution: Cyberware is able to create multiple limbs from anywhere on his body. these limbs strength are able to transfer from one limb to another, which can pack a huge punch, shattering the very universe and leaving tremors traveling across the multiverse

MainFrame code beam: Cyberware can create a beam that turns people into mainframe code that he then absorbs

Life absorption: Cyberware could absorb life and make his lifespan longer than it already is, and he gets stronger by doing so too

Relationships:

Error404!Sans: The one that made Osiris in the first place, Error404 and Osiris have a somewhat passive-aggressive relationship with one another. Despite this, though, they are in somewhat friendly terms, as long as one of them does not attack the other one carelessly.

Righteous!Error: The apprentice or Error404, as well as a Polothorn, Righteous!Error, compared to Error404, surprisingly get along swimmingly, due to him being kind despite being a destroyer. Osiris and Righteous!Error even have a tendency to meet with one another when they have the chance of Error404 comes in.

Hollow!Ink: Osiris despises Hollow!Ink with a burning hatred, due to how reckless and uncaring his actions are to the Multiverse and above that. Him taking the Unnameable Soul added more fuel to the flames, with Osiris vowing to make Hollow!Ink suffer.

Infected: Osiris has mixed opinions in Infected, due to his alternate personalities. But the Infected Personality and the Osiris Personality truly despise each other and want nothing more than to make the other one suffer.

Loading: The Fail-Safe of the MainFrame, Loading was mistaken Osiris for Error404, and fought against him, only for Osiris to stomp him and take him down. Loading vowed to make Osiris pay for the beating he took from him, but would not be very brave against him when he is in his D.E.L.T.A.R.U.N.E form, where he has control over the MainFrame itself.

Malware: Osiris doesn't like Malware at all, even admittedly hating him due to what he is like. Despite this, he would put his hate aside if it means standing a chance against him, such as being able to take down an enemy that requires the both of them to work together, even making the Cyberware form in order to make his job easier.

Cruel to Kind!Ten No Kami: The Daughter of MalesGrow, as well as his 10th child, Ten no Kami and Osiris get along a little bit well with one another, due to both possessing similar personalities.

Notes:

Osiris once befriended a human. She was very kind to Osiris.

Osiris, unlike William, does it because it's fun.

Osiris is mentally unstable and lonely instead.

Osiris is a pure MainFrame being, meaning he has full access to it because he is like a son to MainFrame.

Osiris is not a skeleton, even though it was created by a skeleton.