Sheila (Elementary, My Dear 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 is a friend and companion of the masked Mexican wrestler, Senor 105, who she met in Paris.

In Elementary, My Dear Sheila she is almost killed when someone removes the string from her balloon, allowing the helium within to leak out. Sheila also appears in the spin-off short story collection, Senor 105 and the Elements of Danger.

Appearances
IWN: Elementary, My Dear Sheila

IWN: The Shape of Things