Petri is an alchemist.
Night: Inside of Crankshaft's Workshop - Port Puerto Marina
- Unlocks the Wisdom Flask recipe at Expert rank
- Unlocks the Love Bomb recipe at Master rank
- Gives three Ultima Alcheweeds upon reaching God-in-Training rank
Petri is able to join the player's party once the player has reached the rank of Adept in the Alchemist life. He can heal himself and heals the player and other NPCs on occasion. He attacks with paper planes and poison bombs.