Geoff looks like an ordinary mooshroom, with a red coat and white spots, mushrooms on his back and head, and with black eyes, if he is sheared, he becomes a cow.
- "G-E-O-F-F... That spells 'my best friend.' Love you, Geoffy."
- —Oxblood to Geoff (Determinant). src
Geoff is the pet of Oxblood, and loves Oxblood too. He is obedient to Oxblood, as him listening to him when he said "run."
- "This creature cannot be allowed to undo the balance of the Mush Room."
- —The Warden to Jesse. src
The Warden is outraged by Geoff's existence because he "undoes the balance of the Mush Room" and is glad that Jesse caught Oxblood keeping him. He tells Jesse to shear him and later tells other guards to take him away (determinant), showing no regret.
- Geoff is the first and only mooshroom seen in Minecraft: Story Mode so far in the series.
- He is the only character whose species can determinately be changed.