Diablo 4's Vessel of Hatred Expansion Introduces Mercenaries

Players can now recruit and customize NPC allies to aid in their journey through the new expansion.

Diablo 4's Vessel of Hatred expansion adds a new Mercenary system, allowing players to recruit NPC allies.
Players first encounter Raheir, the initial mercenary, who introduces the system and serves as a tank with defensive abilities.
Additional mercenaries, Aldkin, Subo, and Varyana, can be unlocked through specific quests found in the Mercenary Den.
Mercenaries have skill trees and gain Rapport, which players can use to enhance their abilities and customize their roles.
Solo players benefit from mercenaries as bodyguards, while groups can assign reinforcements for strategic combat support.