Nate

Nate Smith was a soldier in the US Army during the Sino-American War, one of the people admitted into Vault 111, and the husband of Nora.

Background
Nate is a former soldier who served in the United States Army during the Sino-American War. At some point, he married Nora and they had a son, Shaun in 2077. On the morning of October 23, 2077, Nate was preparing for an event at the Veteran's Hall in Concord when a Vault-Tec representative visited the family to inform them that they have pre-approved admittance into Vault 111.

Mere moments later, a news bulletin warned the family of an imminent nuclear attack, which forced Nate, Nora and Shaun to rush to the vault, leaving their personal Mister Handy, Codsworth, behind.

After entering the vault, the family, along with the other admitted residents are placed in cryo-sleep by the Vault-Tec scientists, under the guise of decontamination prior to entering the main vault. Centuries later, he is disturbed from his cryogenic sleep by Conrad Kellogg and two unknown Institute scientists and executed by Kellogg, while attempting to stop the scientists from kidnapping Shaun.

Trivia

 * Although the narrator of the story is Nora, the prologue is told from Nate's perspective.
 * Danse's character bears an uncanny resemblance to Nate's, both of them being soldiers and love interests for Nora, as well as having similar personalities. It's not clear whether this was purposeful or not.
 * In the video game, Nate is the one who takes Shaun into the Vault. In the book, it was changed to Nora.￼