- See Arnold for other articles with titles that contain, either by relationship or by coincidence, this character's surname.
Arnold was a male Human Starfleet officer in the early 25th century.
In 2409, Commander Arnold was assigned to Dyson Joint Command after the discovery of the Solanae Dyson Sphere in the Delta Quadrant. He briefed arriving Alliance officers on the battlezones in the Dyson sphere. (STO mission: "Secure Voth Points")