Rhomann Dey is a Corpsman in the Nova Corps, the planet Xandar’s military force. Dey is a loyal and trusted officer but his by-the-book attitude takes a detour when he develops an unlikely rapport with Star-Lord.
While Gamora, Rocket and Groot were fighting against Star-Lord, the Nova Corps arrested the trio, on that Rhomann Dey recognizes Peter as Star-Prince, Peter responds that Star-Lord but Rhomann Dey tells him to calm down because it is not a good nickname. Dey along Saal presented in Kyln the future Guardians of the Galaxy.
After Yondu and Star-Lord stamped a deal, Star-Lord communicates with Dey to report that the Guardians help to stop the great accuser kree, Ronan. Dey reported this to the Nova Prime, Irani Rael.
After the battle, Dey is promoted and presented the Guardians his rebuilt ship. Later, Dey returns to his home and is reunited with his family.