Ustanak is Jake's relentless pursuer. He appears multiple times, often with different weapon attachments. His weak point is the glowing heart on his chest, but it's often protected. During chase sequences, focus on evading and using environmental hazards (exploding barrels, collapsing structures) to stun him. In direct confrontations, aim for his head to expose his heart, then unleash your strongest attacks. When he grabs you, perform the QTE successfully. Utilize Sherry's stun rod to create openings. Later encounters require destroying his various weapon arms before targeting his core.
Much like the relentless Lady Dimitrescu in Resident Evil Village, Ustanak serves as a persistent stalker that forces players to prioritize environmental navigation over direct combat.