The Blue Mist has been a mainstay of the Mexican super-hero set since the late 1980s.  Luis Delgado first gained the mysterious power over the blue mist when he was in his early twenties.  A son of a vastly rich family, Delgado had become something of a playboy and was a frequent guest at socialite parties across Mexico City and even across to Verona Bay.  He was drawn to the darker side of socialite life and engaged in daring and irresponsible activities, and it is this part of his life that has driven him to make amends in his later years.  His acts during this time were both criminal and immoral.

The turning point in Delgado's life came when he inadvertently crossed swords with the Cult of the Blue Flames.  He had accepted an invitation to one of the Cult's secret and bloody festivals but when he arrived he realised that the night's sacrifice was to be Marta Indurain, a girl he had grown up with.  Marta's family had fallen from grace amongst the elite and she had somehow been promised to the Cult as a way of paying back some debts.  This cruel twist of fate stuck in Delgado's heart.

Not one to allow a party to be ruined, Delgado turned the tables on the Cult.  He decided that if he wasn't going to enjoy the night as it was, he would turn it into something more to his liking.  He leapt into the inner circle and confronted the High Priest, first with words and then quickly with his fists.  In daring style, he grabbed the unconscious Marta and hobbled down a secret passage.

Unfortunately for Delgado he was trapped.  His heroic move was quickly cut off and he was imprisoned by the Cult: cast into shackles and locked in a dark room somewhere under an abandoned warehouse.  None of his friends alerted his family.  It was as if he had disappeared.  The following week he and Marta were brought to a different festival.  It was still conducted in the middle of the night, but this time it was attended by only the elite of the Cult of the Blue Flames.  Delgado had insulted them and he was to burn alive in the sacred flames.  Delgado struggled but he was no match for the burly assistants.  He was dragged up to an altar and after some very long-winded sermon, he was tossed into a pit of blue flames.

He screamed.  He couldn't help it.  But he soon realised that he wasn't being burned.  All around him the flames shied back.  He reached a hand tentatively towards the flames but they fizzled and died out.  Above him the priests were in shock.  They murmured amongst themselves and appeared emasculated.  Delgado leapt to the altar, grabbed the edge and pulled himself out of the pit.  He punched the head priest and kicked out at the surprised assistants.  This time, his kicks were more impressive and the burly men were thrown backward and down the small flight of steps. As he surveyed the area Delgado realised that his body was issuing a swirling blue mist which obscured everyone's vision, but not his.  He used the distraction to grab Marta and flee.

Once home again he realised that the life he had been leading was a dead-end.  His parents hadn't missed him and none of his so-called friends had even bothered to look for him or contact the authorities.  He was alone, and he had been alone for a long time.  Marta seemed to be the only one he felt a connection with.  He ensured she was safely returned to her family although neither one of them spoke about their ordeal.

Delgado left home and set up an apartment in another suburb.  He explored his powers and realised that he had imbued some of the power of the blue flames.  Taking on the moniker of La Bruma Azul (or the Blue Mist), Delgado fashioned a super hero detective career for himself.  In the early 1990s he joined the Mexican super hero team, Guardas, although the team was never fully organised.  It was more like a social gathering of masked heroes and vigilantes, but Delgado embraced his new fraternity.  While continuing a street-level crusade against crime, Delgado also started seeing Marta romantically.

When Guardas was decimated by Apocalypto, Delgado was the only survivor and managed to co-ordinate a group of heroes to oppose the extradimensional entity.  In the wake of Guardas' defeat, Delgado formed Defensa Suprema which quickly gained widespread support from the Mexican public, and then from the government.

The Blue Mist is the current leader of the Defensa Suprema and has proven himself to be a level-headed strategist as well as a gentleman in all regards.  He and Marta are engaged, but the engagement has now stretched to five years.  Delgado has no immediate plans to set a date, for doing so would lead to his eventual retirement as the Blue Mist.  In addition to this sense of doom, Delgado also has difficulty deciding how and when he will tell Marta about his secret identity.

Delgado has always been a smooth operator but he never takes advantage of others.  He comes from a privileged family and knows that he has no reason to complain about anything.  He is a practical leader who takes advice but knows that any decision will lay on his head, and any consequences will be his to deal with.  In costume he appears to be something of a swashbuckler and has swept innumerable women off their feet (in the course of rescues, of course), including Marta, although he takes great care in keeping his Blue Mist and his Luis Delgado identities separate.

"There is no need for this melee, gentlemen.  Lay down your firearms and accept the consequences of your crimes.  The only other alternative is to have your guns taken from you, and I can no guarantee that you will come out of such a confrontation without injury."

Since being thrown into the pit of blue flames, Delgado has been able to exude a blue mist from his pores.  At first this power seemed limited to producing a thick mist which hampered the vision of others, although not himself.  However, after some time he has learned to use the mist in a number of ways.  By making the mist solid he can entangle others or strike them with some force.  He is also able to temporarily transform his own body into blue mist and pass through walls or disappear, only to reappear up to 60m away.

In addition to his mist powers, Delgado also employs a sophisticated armour system including a mask with enhanced vision and hearing as well as an independent air supply.  Since becoming the Blue Mist, Delgado has also trained extensively in karate.

Luis Delgado is a handsome man with dark skin, a thin moustache and deep blue eyes.  His eyes were brown before he encountered the blue flames, but he explains this away as being a legacy of his maternal grandmother who was an American.  He hardly sees his family anymore but when he does he suggests that he wears coloured contact lenses.  Indeed, during his first few years as the Blue Mist he did wear brown contact lenses to conceal his transformation.

As the Blue Mist he wears a silver-grey chest plate over a light blue reticulated armour.  He has streamlined his armour from his early days, but it still appears to be a series of separate plates.  He wears a dark blue cloak and a light blue mask with two large eyes.  His face is completely concealed and he alters his voice enough to throw any noisy reporters off his trail.