Bear is a dog used by the Washington Liberation Front in The Last of Us Part II. While initially appearing as a minor enemy in Ellie's story, Bear becomes an interactable NPC during Abby Anderson's story.
Events of The Last of Us Part II
Bear is encountered by Ellie while on patrol with his handler, guarding the flooded parts of the city from the Seraphites. Ellie can choose to let Bear go or kill him.