Olive is a sphere with a dull olive color and a thin stem. Surrounding it is an olive membrane, and in its center is a red-orange eye with a light yellow sclera.
Olive seems to be somewhat curious, and protective of BMO.
Olive has the ability to scan robots, as seen when it scanned BMO's body.
- Olive’s design strongly resembles Plankton from the Spongebob Squarepants franchise.
- She shares a number of characteristics with Jake.