Sheila (Elementary, My Dear Sheila)

Sheila was a Sentient, one of the original species from the birth of the universe. She was made up of sentient helium atoms, enclosed in a balloon, and was a friend and companion of the masked Mexican wrestler, Señor 105, whom she met in Paris. (PROSE: Elementary, My Dear Sheila)

Biography
Sheila was rescued by Señor 105 in Paris. (PROSE: Elementary, My Dear Sheila)

While a resident at Señor 105's home, Sheila integrated himself with his guests Tadaaki Tea, Chago Serpiente, Diana Gulbronson and Zorge Zumbido when Señor held a dinner party in memory of his mentor Viento. Following the party when the guests had retired to their rooms, Diana stole a map and perfume bottle and attempted to navigate the hidden labyrinth below Señor 105's house on behalf of the Terrible Kings. A wrong turn led Diana to walk into Zumbido's room where she was witnessed by Zumbido himself and Sheila. She attacked the pair and murdered Zumbido by bashing him over the head with the perfume bottle and strangling him to death with his own hands, before popping Sheila's balloon casing and leaving her to die by being dissipated into the air. Sheila was saved when Señor 105 ordered Mr. Tea to locate a replacement balloon for her to inhabit. (PROSE: Elementary, My Dear Sheila)

Appearances
Sheila originally existed within the contents of a yellow latex balloon, however, she was popped by Diana Gulbronson and Señor 105 was forced to place her into a green balloon. (PROSE: Elementary, My Dear Sheila)

Behind the scenes
On Paul Hanley's account, he revealed that the balloon held by David Bowie on the back cover of Lady Stardust may contain Sheila.