Doramed III is a robotic cat of the same model as Doraemon and a member of The Doraemons, an old boys' association formed with six other robotic cats from their time at the Robot School. He possesses one of the group's Best Friend Telecards, a gadget symbolizing their oath of eternal friendship that enables communication and mutual aid.

Of Arabian origin, he wears traditional clothing and serves as a royal consultant and oracle in Saudi Arabia, though he resides in Baghdad, Iraq. He is skilled in magic and the black arts, frequently employing tarot cards for prophecy. His main tool is a Four-Dimensional Magic Lamp, which serves as his equivalent to Doraemon's four-dimensional pocket, though he also maintains a standard four-dimensional pocket on his stomach as a backup.

He exhibits a pronounced fear of water, or aquaphobia, which leads him to prefer his dorayaki frozen. Despite this phobia, he aspires to construct a water theme park named "Water Land" for children in desert regions. When enraged, he undergoes a proportional physical transformation, growing into a powerful giant whose size increases with his anger. He reverts to his normal size upon calming down or upon realizing he is stepping in water.

Within The Doraemons, he is one of the more magically adept members, and his abilities in magic and prophecy are regularly called upon during missions. He operates as a public servant in his community, consistent with the occupational theme shared by the group.

His background includes being a manufacturing defect from the robot factory, a trait shared by all members of The Doraemons. This shared origin of being considered failures or special cases during their Robot School days bonds the group, and they were placed in a special position at the school as a result.