Golbez, real name Theodor (セオドール, Seodōru?), and called Man in Black (黒衣の男, Kokui no Otoko?) before his identity is revealed in The After Years, is a non-player character in Final Fantasy IV and a playable character in Final Fantasy IV: The After Years. In Final Fantasy IV, he is an antagonist, a powerful sorcerer who pursues the Crystals. In The After Years, Golbez returns as a playable character.
In Final Fantasy IV, Golbez is a tall imposing man in dark blue and black armor with gold trimmings and a helmet with tall horns. The lining of his cape has been both red and blue sometimes even in the same game—the 3D remake release shows Golbez's official render with a blue lining, but his in-game appearance has a red lining. The exact color of his armor has also varied between appearances, from light blue to dark blue to black.
Through the majority of Final Fantasy IV, Golbez is a cruel and heartless man who will stop at nothing to obtain the Crystals, destroying anyone and anything that stands in his way. He is a cunning manipulator, tricking Cecil and his allies into retrieving two Crystals for him, and otherwise luring them into traps.
As Fusoya later reveals, Golbez is being manipulated by a powerful Lunarian named Zemus by bonding Golbez's thoughts with his. Awakened, Golbez's personality returns to his true self; Golbez is horrified by his actions and feelings of hatred. Golbez's true personality is that of a caring, self-sacrificing, and empathetic individual.
- Sunset Shimmer was inspired by Golbez and shows many similarities with him.
- Both of them start cruel and dishonest due to their malice inside their hearts.
- Both act evil in their debuts after being consumed by hatred and loneliness as shown with their respective tragic backstories.
- Both feel horrified of their actions and feelings of hatred when they turn back to normal.
- Both of them are actually caring, self-sacrificing, and empathetic individuals.
- Both of them have a mind-control spell. Golbez has this until he is freed from Zemus' evil spell.
- Both of them relate to the main protagonist sharing the same bloodline.
- Both of them reform and save the world in their respective sequels becoming heroes as a result.
- Both of them are born in a different place and live in another world. Sunset was born in Equestria but lives on Planet Earth. Golbez was born on Planet Earth, but lives on the moon.
- Both of them have a deep manly voice. Sunset Shimmer is a tomboy having a deep singing voice. Golbez talks with a deep voice.
- Both of them act as supporting characters to the heroes.