Griffin (The Invisible Man)

Dr. Griffin is a fictional character, also known as The Invisible Man, who appears as the titular protagonist in H.G. Wells' 1897 science fiction novella The Invisible Man. In the original novel, Griffin is a scientist whose research in optics and experiments into changing the human body's refractive index to that of air results in his becoming invisible. The character has become iconic, particularly in horror fiction, and versions and variations have appeared throughout various media.

Griffin is a brilliant research scientist who discovers a formula for making a human being invisible. The formula entails taking opium and another drug, which make his blood clear, then processing his body in a radiator engine. It succeeds, but he finds himself unable to reverse the process. Unlike the character in the 1933 film, the Griffin of the novel is possibly a psychopath, even before he makes himself invisible.

Griffin is a gifted young university medical student with albinism, who studies optical density. He believes he is on the verge of a great scientific discovery, but feels uncomfortable working under his professor. To ensure he gets sole credit for the discovery, he leaves university and moves to a dingy apartment to continue his experiments alone.

To finance his experiments, Griffin robs his own father, which drives the father to commit suicide (since the money had not even been his own). Working reclusively in his flat, Griffin invents a formula to bend light and decrease the refractive index of physical objects, making them invisible. He intends from the start to perform the process on neighbours' cat and then on himself, but is forced to rush his experiments due to persistent intrusion from his landlord, who is suspicious of his activities. He processes himself to hide from his landlord, and sets fire to the building to cover his tracks. He winds up alone, wandering invisible and naked through the streets of London, struggling to survive out in the open, unseen by those around him.

...
Wikipedia