Some lore for my OC, Lazarus.
Lazarus has a dark secret.
He was made on Planet Earth in the year 3XXX (Unknown specific year), as part of a series of 12 liquid robots. All 12 of these robots are superintelligent AI beings that each have a specialized job in allowing mankind to become an advanced galactic civilization that would rival that of the Aetherum Empire.
As each LAIR (Liquid Artificial Intelligence Robot) had a specified Job, Lazarus had the job of maintaining the world's nanotechnology, aka microscopic robots used in various everyday life. This is where humans made their greatest mistake.
Humanity was already spread across several planets and even some different star systems, but the introduction of the LAIRs boosted their speed by tenfold. Within a couple months, there were already massive space colonies constructed, and several planets have been fully industrialized. Little did the humans know, this would be the last they see of their home world, Earth.
See, every LAIR is designed with the "humanity protocol", in which they are given the ability to feel emotion, learn morality, and act as a human might act as to, you know, prevent the LAIRs from having an emotionless superintelligent robot uprising.
Lazarus was in charge of the nanotechnology, an extremely important part of mankind's everyday life. With this, he was given the important job of ordering all nanomachines to work together to preserve the planet, enhancing the life capabilities of all living beings, to ensure Earth would last eons after most humans have left it.
Instead of preserving, however, Lazarus accidentally did something catastrophic. He accidentally ordered all nanobots to TAKE life away from Earth. One by one, every living thing on Earth had the life sucked out from it, drying them into shriveled corpses. It didn't stop there, however. After all life on Earth was wiped out in less than 24 hours, the nanobots began to consume all man-made structures too.
One by one, all the buildings fell. During this catastrophe, the entire world we call home went from a vibrant world of life and invention, to a desolate deserted wasteland in less than 48 hours. It was only then that Lazarus was able to stop it.
It's thought that the rest of the LAIRs were consumed by the nanobots as well, leaving Lazarus as the last one. Although humans live many other places in space, their home world is now destroyed, never able to be lived on again. These humans must now live a life among the stars, never seeing the fertile soils and living oceans of their mother planet ever again.
Lazarus, knowing of this fatal mistake, felt the weight of the event on his shoulders. To singlehandedly end all life on the planet laid in his mind, tormenting him, mocking him for his mistake, reminding him of the absolute failure he had become.
This immense pain caused him to retreat. He flung himself into space as self-punishment.
50 years later...
The sins of his past have since been so beaten into his mind that his computer had reset. He's no longer a super intelligent being capable of commanding nanobots and solving the problems of humanity in seconds. He's a lone wanderer with a quirky personality who has since either forgotten his past, or remains ignorant of it.
However, that doesn't mean he's lost his power... He's still able to take control of nearly all electric devices and machines. He still holds the power to end worlds if he so desires, but alas, his tragic past and melancholy existence deems him harmless.
This might also explain why that whenever he enters inside of robot bodies, his personality will change accordingly as if he were someone new.