Duo Maxwell is the son of the original Gundam pilot Duo Maxwell and the pilot of the "Warlock" mobile suit. He is a central character of the novel New Mobile Report Gundam Wing: Frozen Teardrop.

Duo is much more abrasive than his father. Although he speaks in a similar manner to the original Duo in terms of slang and casual language, he often insults those to whom he is speaking, including his own father. His father states this is because he poorly raised the boy on his own after his mother passed away. However, he is shown to have had a poor attitude even as a young child when he and Father first meet.

He is indicated as one of the main pilots to take part in Operation Mythos. Duo is very sure of his abilities, claiming that he is more skilled than Heero Yuy at piloting. However, he refers to Heero as senpai, indicating at least some level of respect for the other pilot.

Duo has been trained to pilot mobile suits and also appears to be a gifted mechanic, much like his father.