Petras

Petras will give you three Smoke Canisters during the Gyala Hatchery (Mission). Siege Turtles will aim their siege fire at the location where you drop the canisters.

After completing the mission, Petras can be found in Leviathan Pits.

Location

 * Leviathan Pits
 * Gyala Hatchery (during the mission)