Merlot

Doctor Merlot is the main antagonist of the video game RWBY: Grimm Eclipse. He has yet to be mentioned or appear in the show itself.

Appearance
He is an old man with one robotic, glowing red eye. He also has a red arm. He has disheveled grey hair and a moustache and beard, as well as prominent eyebrows. He wears a grey jacket with a flared collar lined with a red interior.

Background
Doctor Merlot was the founder of Merlot Industries, a research and development corporation based out of the ill-fated settlement at Mountain Glenn. The corporation began performing experiments on Grimm, later going as far as attracting Grimm to the city in order to acquire more specimens, with disastrous results. After the fall of Mountain Glenn, Doctor Merlot was presumed dead.

Merlot was personally familiar with Ozpin, whom he calls Oz. However, they were on bad terms, with Ozpin believing that the world would have been better off had he died in the disaster that he had caused.

Re-Emergence
However, Merlot in fact survived the destruction of Mountain Glenn, transferring his operation to a highly remote island at an unknown location. He continued his experiments at his new laboratory in secret, creating new forms of mutant Grimm using his serum, a glowing green substance.

Years later, Team RWBY, would lead an investigation of mutated Grimm traced back to Merlot Industries, eventually finding themselves on Merlot's island. His operations uncovered, Merlot revealed himself to the team as well as to Professor Ozpin. However, after Team RWBY infiltrates his laboratory and destroys a mutant Death Stalker, he self-destructs the laboratory.