Ethan was a colonist who was brought aboard the USS Legato in stasis along with Lisbeth by Weyland-Yutani and used as a host for a Xenomorph.
After awaking from stasis aboard the Legato, Ethan removed the deceased Facehugger from his face and met Lisbeth who was taking cover from a nearby Weyland-Yutani PMC killing any civilians in sight with his M240 Incinerator Unit. Ethan told Lisbeth that she must find her parents and escape the Legato. A Chestburster then ripped through Ethan's chest and ran off, killing Ethan and frightening Lisbeth.