Huey left to exact revenge on XOF. After Sahelanthropus was destroyed and Skull Face was killed, Ocelot assisted Diamond Dogs soldiers in securing Serak Power Plant; he attempted to retrieve the fatally wounded Man on Fire, but he managed to escape; though he managed to track him and sent Snake to secure him. After Skull Face's speech on revenge, Ocelot speculated that the Man on Fire may have been what remained of Colonel Volgin, having been manipulated by his desire for revenge against Big Boss.

A while later, Ocelot had to protect the base's upset children from going near a pit filled with toxic chlorine disinfectant; a memento of their deceased friend had been thrown in by Eli and they wanted to rescue it, not understanding the danger. Snakearrived to the commotion and the group ended up witnessing Quiet jump into the pit, managing to retrieve the children's memento but needing hospitalization for chemical burns. After became apparent that Eli was trying to orchestrate a rebellion, Ocelot attempted to interrogate him about his plans. Unfortunately, Eli already anticipated this and worked this into his plans via Tretij Rebenok (who he had formed a bond with in secret); with his powers, the children hijacked the newly-repaired Sahelanthropus and escaped the base. Ocelot attempted to track the group to no avail.

Ocelot tortured Huey for an explanation, suspicious of the timing between Sahelanthropus' repair work and Eli's escape. Ocelot had also interrogated Huey previously regarding the death of Strangelove, whose remains had been found inside the Boss AI. Throughout