Compared to Orbot, Cubot is described as the "funbot" and has a rough-edged personality. While not perfect of character, he is loyal by default, though he will only obey orders after being threatened as dictated by his programming. Gruff and gritty like a beat cop, he is very dim-witted and slow on the uptake, having trouble solving a puzzle meant for babies and gets even the simplest of instructions wrong. Nevertheless, he still has his moments of reasonable insight and common sense. Cubot is normally easy-going, though he has shown a violent and aggressive temper beneath his otherwise bumbling exterior; after several failed attempts, Cubot took charge of getting Eggman out of jail "his way", which involved blowing the jail up with a Disintegrator Ray. What separates Cubot from his prototypes is that he learns from his mistakes, allowing him to grow progressively wiser with each experience (if only slightly).

Cubot has at times shown a lot of self-consciousness and low self-esteem. He is somewhat depressed about being a soulless machine, often longing for more in life beyond his service to Eggman, and ponders over whether he has the making of a good minion or is just a redundant comic relief.

At his core, Cubot is a mindless servant. While capable of making his own choices and forming his own personal opinions, Cubot is weak-willed and unable to be alone as he is extremely dependent on others, and having total freedom overwhelms him with anxiety over the concept of choosing for himself. Fearing as well that he will get send to the scrapheap without a role to fulfill, he will ultimately come groveling back to his employer and gladly demean himself as much as he can in order to resume his duties whenever he is left without someone to serve, showing a complete lack of dignity on his behalf. Supposedly, Cubot also has "Bot-holm syndrome" which makes him ultimately agree with anything Eggman says.

He is played by Wally Wingert, example of his voice can be found here: https://youtu.be/c_qp2mg94EY?t=164