Señor 105 Señor 105 was a famous Mexican luchador with the " finest physique [ and ] the finest mind the world [ had ] to offer " . He had one mask for every element in the periodic table and he named himself after the number of elements in the periodic table , meaning that with each new element discovered he made a new mask and added another number to his name . ( PROSE : " Iris Wildthyme y Señor Cientocinco contra Los Monstruos del Fiesta " ) While he often left Mexico to have adventures across the globe ( sometimes even traversing the Very Fabric of Time and Space using his home - made Zodiac Machine ) , Señor 105 always returned to his house in mid - 20th century Mexico City . ( PROSE : " Elementary , My Dear Sheila " , " Iris Wildthyme y Señor Cientocinco contra Los Monstruos del Fiesta " ) One of Señor 105 ' s closest companions was Sheila , a French Sentient that lived in a balloon . ( PROSE : " Elementary , My Dear Sheila " ) Señor 105 was a friend of Iris Wildthyme ( PROSE : " Iris Wildthyme y Señor Cientocinco contra Los Monstruos del Fiesta " et al ) and a fan of Brenda Soobie - he was unaware they were the same person . ( PROSE : " The Shape of Things " ) MIAOW kept files on Señor 105 ' s activity . ( PROSE : " Elementary , My Dear Sheila " ) History . Early life . He was born circa the 1910s . ( PROSE : " Iris Wildthyme y Señor Cientocinco contra Los Monstruos del Fiesta " ) In his youth , he was taken in by the three most skilled wrestlers of Mexico : Tierra , Viento , and Fuego . They trained him to be one of their own , but he decided that their ways were too mystical for him and chose to become independent with a scientific motif . Naming himself after the number of element s in the periodic table , he became " Señor 93 " . The first wrestling mask he created for himself was Number 93 , Neptunium . In the late 1940s , Señor 97 visited New York City and had an adventure which involved the construction of the United Nations headquarters . Diana Gulbronson remained in debt to the Señor for saving her life . ( PROSE : " Elementary , My Dear Sheila " ) The 1960s . In 1963 , he saw Brenda Soobie live in Las Vegas . ( PROSE : " The Shape of Things " ) In the summer of 1967 , Señor 105 attended a party Brenda Soobie held in Las Vegas . While walking through the celebrations , Brenda saw 105 by the pool , teaching Lawrence Burton and Jay Eales how to make paper aeroplane s . ( PROSE : " Party Fears Two " ) By summer 1968 , Señor 105 had met several Mexican president s , visited the Eiffel Tower , went on a boat ride with Albert Einstein , and encountered UFO s , witch es , werewolves , purple midgets , and " El Hombre Invisible " . On the day of the opening ceremony of the 1968 Olympics in Mexico City , Señor 105 met Iris Wildthyme and Panda while trying to stop an army of spirits possessing piñata s from disrupting the Olympics . While 105 wrestled Axixmiqui , the leader of the spirits , Iris manipulated the mathematical ratios involved in the dimensional doorway the spirits were creating . When the doorway was activated , the spirits were all sucked up into a mini - singularity . Afterwards , Señor 105 helped Iris repair her Celestial Omnibus and gave her a 1968 Olympics bracelet and the mask he made for titanium as parting gifts ; using knowledge gaining from observing the workings of the omnibus , 105 was able to complete the Zodiac Machine . ( PROSE : " Iris Wildthyme y Señor Cientocinco contra Los Monstruos del Fiesta " ) Undated events . Señor 105 once visited Tlalocan with his young friend Rodrigo . Primo de la Vega saw 105 and Rodrigo while dreaming . ( PROSE : " Against Nature " ) While travelling with Iris Wildthyme and Panda , Señor 105 aided them in obtaining the third slice of the Celestial Gateau from vampiric versions of Mick Jagger and Keith Richards . Afterwards , Señor 105 helped celebrate Panda ' s birthday . ( PROSE : " " ) References . When Panda ' s subconcious was trying to get Panda to remember his life before being trapped in the Pleasure Prison , he had a vision of Iris Wildthyme saying , " Quick lovey , Señor 105 needs our help and he ' s in a right pickle . " ( AUDIO : " Whatever Happened to Iris Wildthyme " ) During an encounter with an Elder God on Mars , Iris mentioned a " colourful " friend of hers with a large collection of masks that each gave him abilities when he put them on . ( PROSE : " Doomed " ) Behind the scenes . Señor 105 starred in a series of 9 novellas called " The Periodic Adventures of Señor 105 " which had several connections to " Doctor Who " and its various spin - offs . Obviously , it continues the story of Señor 105 ( and Sheila ) established in his first couple of appearances in the " Iris Wildthyme " series . The third novella , " By the Time I Get to Venus " , features El Jefe , Theo Possible , Litany Chromehurst , and the version of the Venusians seen in the novel " Venusian Lullaby " . The fourth novella , " Señor 105 and the Secret Santa " , references Iris Wildthyme and Hyspero .