Mango

An accidental creation, Mango originated from a singular malfunctioning medical nanite. Although it was cast out, it still came to its own, pursuing it's one_purpose in its programming. Make life? This couldn't be correct. But it still does so. It in itself would begin to invade certain deceased animals and humans, taking their tissue and chemical makeups and attaching them to one creature in particular. Almost from scratch, it redesigned its entire skeletal structure, organ system and even nervous system with a 100% completely functional and intelligent brain. This was almost the perfect, sentient being. However, there were errors. It lacked visual quality over functionality, so this creature turned out to look like a monster. Avoided by the average man, woman or child, it was eventually brought into a facility. Here, it would be experimented on, tested and contained. However, all this would change, as the creature lost control over itself and lashed out at the facilities staff. Gaining an arsenal of weapons, he would destroy this place and burn it to the ground, continuing his life in the shadows soon after. This is a dangerous individual.