A Titans officer who served with the EFSF during the One Year War, he fought in the Battle of Solomon and later the Delaz Conflict in U.C. 0083. He is commander of the Titans Test Team and leader of the Murphy platoon (Black Otter Team). He is a level-headed veteran of mobile suit combat with excellent skill. Severely injured during combat in the closing days of the Gryps Conflict, Murphy later escaped from a hospital where he was admitted to appear at Eliard Hunter's trial as a witness. He was subsequently discharged after the end of the trial but restored as an instructor with the Federal military academy.
- Murphy has a fondness for rabbits and owns a pet Netherlands dwarf rabbit named Peter.
- He is responsible for nicknaming most of the Titans Test Team's experimental TR-series machines.