vault_boy
Mascot of the Vault-tec company, a major technological developer of the Fallout universe, before that world's atomic apocalypse. This is also the mascot of all the game's perks and traits. In the Fallout_TV_series, it is revealed the Vault Boy was inspired by Cooper_Howard, who was the original mascot and spokesperson for Vault-tec.
The Vault Boy and the "T51-b Power Armor" are the two most iconic elements in the Fallout series.