Matéo Serrano is a former FND engineer and tank designer who leads an Insurgency in Conuco after the main story. He is one of the post-game leaders you hunt down to stop FND remnants retaking the province.
Matéo was an FND engineer, likely under the commander of the mechanised brigades. After Castillo's fall he gathers what is left of the army in Conuco and tries to take the province back.
He charges to close range, so do not let him corner you. His EMP grenades knock out vehicles and electronics, so fight him on foot. Destroy his turrets early, since they keep you pinned while he closes in.
Petra Toca
Petra Toca heads a co-op of farming families in Valle Fernando, Conuco, and feels the guerrillas have ignored her people. Her Yaran Stories have you fixing problems on local farms and then saving her daughter Gloria.
The Dentist
The Dentist is an FND officer under Admiral Benítez who earned her name from how she tortures prisoners. She holds the Grand Hotel Gaballero in El Este, and you take her out in Yelena's operation Room Service.