|Enhanced Tactical Humanoid 3rd Revision|
|Appears in||Call of Duty: Infinite Warfare|
|Rank||Petty Officer First Class|
|Killed By||Nick Reyes via sacrificial explosion|
|Death||May 7th, SDF Shipyard, Mars' Orbit|
|Weapon||FHR-40, EBR-800, R.A.W.|
|Timeline||Infinite Warfare Timeline|
|Voice Actor||Jeffrey Nordling|
- "Enhanced Tactical Humanoid 3rd Revision, or E3N, is the newest addition to the Retribution's crew. The perfect soldier, he is not only stronger, faster, and more durable than any human, but he is also programmed with a personality construct designed to integrate him quickly into any unit."
- — Captain's Log.
Petty Officer First Class Enhanced Tactical Humanoid 3rd Revision (E3N) (A.K.A. Ethan) is one of the supporting characters in Call of Duty: Infinite Warfare.
E3N is designed to be a "one-of-a-kind" tactical soldier bot, capable of human responses and emotions. Initially it is not accepted by some of the crew members, especially Omar. However, Omar eventually grows to like E3N.
Before the attack, Ethan was mentioned by an unnamed Petty Officer, that it was already on the roof and ready to fly to the ceremony. At the Raven, Raines mentioned that Ethan was supposed to be introduced at the Fleet Week Ceremony, while Ethan informs that the AATIS guns appeared to be tracking their fleet.
Fortunately, 4 people including Ethan survived the shot by the AATIS, making their way to retake the AATIS Tower. After retaking the tower and stopping the AATIS guns' self-destruct, Ethan boarded in Reyes' Jackal as a co-pilot and launched to beyond earth's atmosphere to destroy the rest of the remaining SDF Fleet that invaded earth. Unfortunately, after they successfully destroying the remaining SDF Warships, the entire UNSA Fleet was ambushed by SDF's Supercarrier Olympus Mons, resulting in only two ships surviving, the Retribution and Tigris
After being ambushed by the Olympus, Ethan and Reyes landed on the Retribution. Raines tasked them and the marines to take back the Lunar Gateway Port on Luna(moon).
- "Good luck, Reyes. It's been an honor, sir."
- — Ethan's last words before sacrificing itself.