Robtop is the protagonist and main character of Geometry Dash icons. He is neutral, but brave, athletic optimistic and somewhat random, always going out for adventures to look for random things.

Skull Thing is the secondary protagonist of Geometry Dash characters. He is Robtop's best friend, and always hang out together with random joy. 

Skull Thing is a curious but a happy icon. With Robtop, he'll also be looking forward for adventures to look for random things.

Robtopana is a primary and extra character of Geometry Dash characters. She is a female counterpart of Robtop. Both Robtopana and Robtop were couples after years of her searching him since they first met each other back in 2018.

Clone is a recurring character and an arch-rival of Robtop. He is an opposite version of his real counterpart, and will continuously proceed to do evil things like Robbie, I guess.