Satan (Universe 111)

Satan, Mao-Su or Ironmouse is a demon queen from the underworld who resides on the surface of Planet Earth in the Universe 111 to stream as a VTuber. She debuted on an unknown platform on 2017 and switched to Twitch in 2019.

She came and moved to the human world out of a desire to explore what it's like to live as a human being, something she can't achieve without wearing a pair of magical sleigh bells that keep her from achieving a true form, which can possibly spell the end of the human race as we know it. However, in the process, her friend Bubi had been left behind her.

She possesses a cult that has the ethical and moral role of keeping her from taking her bells off by tuning into her livestreams so as to feed her with pieces of energy from its souls and counterbalance the bells' weakening effects. Because of this dependency and the uncertainty of how long she can keep her bells with her, she's deemed a similar threat to humanity to Hime Hajime, though its unknown which universes' inhabitants are affected.

Background
At the start of humanity's existence, when they formed original thoughts and learned about divine beings, she was ruling the underworld from a castle deep within. Soon, however, her days of ruling became painful and sore for her. Her meddling with the human world's affairs soon pushed her to crave for the desire to experiment what living like a human was like.

One day, she escaped from the castle to move to the human world, hoping to easily achieve her goals. Her friend, Bubi, had to sadly be left in the underworld in the process. However, she found herself with a roadblock. As each year passed with the throne of the castle empty, her power overgrew and became more uncontrollable, risking the achievement of her true demonic form. Not wishing to hurt any human but still wishful to remain on the atmosphere of the planet, she recalled a special attendant and friend of hers having gifted her a pair of magical sleigh bells, whose role is to keep her from overpowering, but at the risk of instead underpowering herself if she doesn't consume human souls and instantly reaching her true form if they're ever removed from her body.

Hesitant at first, she decided to wear them, but she regretted knowing she had to consume souls because of her deeply grown attachment to humanity by then. She discovered a solution in the form of streaming herself over the internet on a later day, as she found that she can instead gather enough live viewers to only consume a small piece of energy from their souls. Since little after then, she started streaming and forging a cult with the responsibility.

Current times
She currently leads a supporting cult that tunes into her livestreams to both get entertained with her and provide her with soul energy pieces to keep her from achieving her true form.

On December 24th, 2019, she signed an agreement to become part of VShojo.

General Information
Ironmouse speaks English, Spanish and a decent bit of Japanese.

She often speaks and claims about her acquired Puerto Rican nationality, but besides the mystery behind how and why she got it, it doesn't matter in the long run because of her ability to teleport to any location, which she's believed to often leverage. Her teleporting destinations, however, are often unknown, although she has expressed that she has lived along hispanic people for a long time, so it's believed that she mostly visits Spanish speaking countries.

After Universe 222's debut
On February 22nd, 2021, a new Ironmouse debuted alongside the revelation that this new iteration was part of an Universe 222. In the process, it was revealed that the Ironmouse that preceded her was part of a different Universe 111. The transition implied a transition in the audiences to the new Universe, including those that form part of the cult, though it's only estimated at most that the audience and cult that now support the Ironmouse from Universe 111 are slightly alternate versions of those.

Teleporting
Ironmouse has the ability to teleport anywhere, just like Hime Hajime. However, unlike her, she doesn't need an accessory to do so due to her nature as a demon.

Shapeshifting
She also has the ability to shapeshift, though vast degrees of shapeshifting risk her to lose control and overpower herself, although it's not confirmed if she might instantly achieve her true form in the process or just risk gradually overpowering herself like she was before wearing her bells.

However, it is deemed that she has applied small lengths of shapeshifting in some areas. For example, her voice sounded entirely different than usual when singing opera tunes, and so it's possible she temporarily shapeshifted her vocal chords. Ever since she wore her 2020 christmas outfit until after then, her cup size was also affected, having grown in size, which is deemed to be the result of her having shapeshifted it.

Levitating
She's able to float over the ground and across the atmosphere, though it's unknown how far she can do so. While floating around, she's also able to turn around at vertiginous speeds.

Cult
Ironmouse leads a cult of followers often called, branded and claimed to be a "Precious Family". Their members have the ethical and moral obligation of tuning into her livestreams in order to feed her with pieces of energy from their souls so as to keep her in control from the weakening side effects of her sleigh bells.

It is often erroneously believed to be identified as a cult because people rumor her to be Satan, but it's hardly possible that she might be because of her willingness to sing religious songs without a problem. However, people still fondly nickname her as such.

Survival Controversy
Ironmouse's sleigh bells are critical to her survival on Earth as a reduced demon. However, her cult's supporting role isn't believed to be sufficient to protect humanity from extinction. Due to the fact that these have to be worn at all times, her bells are put into question on how they fit within some of her daily needs and how they might not be preventable from accidents that could get them off her.

Among those concerns, people are worried she might bump her bells out with her tail like she accidentally bumps her face with it. It's also believed she can't sleep sideways or bathe her head. She often shakes a lot within unprecedented moments such as when some of her livestream viewers trigger her to sing songs like Kulikitaka.