Episode 48
Not in any episode.
No
Episode 13 - Fullmetal vs. Flame of the 2003 Fullmetal Alchemist anime.
Episode 51: Laws and Promises (Original Fullmetal Alchemist)
Season 3 Episode 12 (or just Episode 37) - "The Flame Alchemist, the Bachelor Lieutenant, and the Mystery of Warehouse 13.
Breda, Falman, Havoc, Hawkeye, and Furey.
Not in any episode.
No
You never see his grandfather.
Episode 13 - Fullmetal vs. Flame of the 2003 Fullmetal Alchemist anime.
Episode 51: Laws and Promises (Original Fullmetal Alchemist)
Season 3 Episode 12 (or just Episode 37) - "The Flame Alchemist, the Bachelor Lieutenant, and the Mystery of Warehouse 13.
Roy Mustang was created in 2001.
In episode 30, "The Ishavalan War of Extermination," in Fullmetal Alchemist: Brotherhood.
He wears an eye patch in the last episode of the first anime and in the movie Conqueror of Shamballa.
No.
No Roy Mustang is not gay. He falls in love with one of the FEMALE captains serving under him