Mercedes Quevedo is the second Peruvian to take on the name Robusteza, although she is not technically a robot but a cyborg. During the 1990s the Peruvian government in conjunction with RobusTECH Industries created an artificial intelligence housed in a nearly indestructible metal casing. The technology was part conventional and part extraterrestrial. The result was Robusteza.

'He' was given the job of protecting Peru from the threats of a modern world and was quickly put to this task by a series of attacks by rogue robots, which turned out to be earlier prototypes of his design. Robusteza proved to be highly intelligent and adaptive, and in front of millions of television viewers despatched the robot enemies with ease and ingenuity.

Taking the name Roberto, he was accepted by the Peruvians as their champion and became a public hero as well as government agent.

As the years progressed he became more and more sentient and displayed emotions which led to an unusual affair with the daughter of his governmental aide. Mercedes Quevedo was eighteen when she and Roberto publicly revealed their relationship. She was caught up in the whirl of publicity, but what began as a strange and quirky relationship developed into something deeper.

Roberto loved her. And she began to love him, even with his on-again, off-again emotional responses.

When Roberto was destroyed during an attack by the uber-supremist group, Junta, the country went into mourning for their hero. Mercedes couldn't cope and attempted suicide only to end up clinging to life with the help of a life support system. The government called in cybernetic expert Dr Guy L'Estrie and commissioned him to forge a new Robusteza using Mercedes. L'Estrie opposed the idea but did assist with stabilising Mercedes and then bringing her out of her coma. Before he left, the government swooped down on Mercedes and told her of their plan to use her to bring Robusteza back to the people.

Mercedes was still devastated by the death of her robot husband and she agreed to the procedure which would save her life, enable her to walk again, as well as make her something more. L'Estrie was not fully convinced but he was also intrigued with the first Robusteza's technology. He agreed to work on Mercedes and after twelve months of initial and follow-up procedures Mercedes became Robusteza Dos, the second Robot.

Her cyborg body was mostly discreet and she was able to pass for normal in the streets if she wanted to, but more and more Mercedes felt detached from the people around her. She could see more than they could and hear beyond their normal conversations. Long after L'estrie left she worked on her own cybernetic developments and added a third arm, using her husband's actual body.

She continued his work with the government although her offensive capabilities are more conventional and consist mainly of handguns. This change from the first Robusteza's flashy energy blast attacks has stropped Mercedes from becoming as popular a public hero as her husband, but she is still embraced by the people of Peru, more through a shared grief than any genuine love for her.

Robusteza Dos works for the government in a public as well as covert manner. She has also initiated her own investigation into Junta's operations and seeks revenge.

Mercedes was once a wide-eyed girl thrust into the public life. She grew up in the spotlight as the young bride of Peru's robot superhero. After his death she fell into a deep depression and has never fully recovered. Her outlook is much darker than the first Robusteza's ever was, or was ever capable of. She has faced death many times and also delivered death to opponents, although this is kept from the public.

She is also very lonely and feels like she has exchanged her life and humanity for one shot at vengeance. She is consumed with a growing passion to take revenge on Junta, but she is also very patient and is making sure her strike will eradicate them once and for all. Her hatred and opposition to Junta has also made her somewhat of an anti-uber proponent and she has made some 'racist' remarks in press releases, although she never follows up on them.

"Sub-systems indicate a low level radiation in the area. Probable cause uberhuman physiology. Weapons primed. It is time to clear out this cess pool."

Robusteza is a cyborg with concealed and obvious cybernetic enhancements including reinforced skeleton and musculature which grants her uberhuman levels of strength, speed and reaction times. She has enhanced senses allowing her to see and hear well beyond that of a regular human, and she carries conventional handguns.

Mercedes is the daughter of a Peruvian government official and an American journalist. She has pale skin and blonde hair which used to be long but is now cut very short. The most obvious change to her physiology has been the addition of a third arm which is metallic and composed of an alien compound. One of her eyes is also obviously cybernetic, while the other has the appearance of being natural. In truth both eyes are artificial. There are several tubes visible on the outside of her body which suggest her cyborg nature, but inside her body much of the original tissue and organs have been replaced and enhanced.

Robusteza Dos has a uniform, based on that of her late husband, but she only wears it on official government holidays or for visiting dignitaries. Other times she wears a simple khaki body armour chest plate and jeans. More and more she exposes her cybernetic nature, often wearing crop tops and showing a lot of skin. This has further divided public opinion into those who find the changes in her exciting and those who are repulsed by the truth of her transformation. It was all very well to love the robotic hero when he appeared human, but to see a human become more and more robotic is not the same.