As 1 of the 5 possible companions that the player in the role of the noble De Sardet can meet, Petrus is one of the characters that gamers enjoying Greedfall can get to know the best. He offers paternal advice to De Sardet when in negotiations with opposing forces, however, is also a skilled diplomat who can manipulate the opposition on the player's behalf.

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Also, as a high-ranking bishop within the Thélème clergy, Petrus possesses undeniable proficiency with magic that he will use in combat to shield the player or unleash ethereal fury upon enemies. However, one's relationship with Petrus is a bit different than with the other companions as he acts more like a kind and supportive relative as opposed to a friend and potential romantic partner.

This lack of wooing potential should not be a deterrent for players seeking to get closer to Petrus, as becoming friends with him will result in a passive bonus to one's Charisma Talent while the good bishop is in De Sardet's party. To do this, gamers will have to complete their personal quests, which get unlocked as one progresses through the main quests of the game and can be started by speaking with Petrus.

Petrus' Personal Quest #1 - The Vices Of The Mother Cardinal

close up of the bishop petrus.

The first of Petrus' personal quests will be to help the bishop investigate another high-ranking member of the Thélème clergy, Mother Cardinal Cornelia.

Petrus thinks that she is up to something unsavory and asks De Sardet for their help in investigating, though, be prepared as this will take one's party to the Thélème city of San Matheus, so a positive relationship with this faction would be beneficial here.

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Quest Checklist For The Vices Of The Mother Cardinal

  • Talk to Petrus about his idea
  • Search the cardinal's apartment for clues
  • Investigate the area underneath the palace in San Matheus
  • Disguise the party as servants
  • Interrogate the innkeeper, the prostitutes, and the bookmaker in San Matheus to learn some details
  • Interrogate the moneylender known as "The Magpie" in San Matheus to learn of the mysterious "Candy Cane"

Quest Rewards For The Vices Of The Mother Cardinal

  • 1000 XP
  • +3 Reputation with Petrus
  • Increase Relationship Level with Petrus

Petrus' Personal Quest #2 - Dangerous Bets

petrus in camp.

The player will be able to start this quest after a few in-game days have gone by and Petrus has had time to contemplate his next political move.

The friendly bishop will tell one of his plans to manipulate Mother Cardinal Cornelia by interfering with her vices that were previously discovered.

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Quest Checklist For Dangerous Bets

  • Talk to Petrus about his plan
  • Talk to the bookkeeper at the entrance of the New Sérène arena
  • Ask the bookkeeper about the next fight to learn about the enigmatic Candy Cane
  • Find Candy Cane (he only comes out at night)
  • Ask Candy Cane to set up a fight with Petrus' help or convince Candy Cane to do so with Charisma check-based dialogue
  • Wait for a full day
  • Head back to the arena to start the duel with the champion
  • Defeat the champion in a 1-on-1 fight
  • After defeating the champion, go speak to Mother Cardinal Cornelia to complete the quest

Quest Rewards For Dangerous Bets

  • 1300 XP
  • +3 Reputation with Petrus
  • Increase Relationship Level with Petrus

Petrus' Personal Quest #3 - Sins Of Father Petrus

petrus telling the player about their mother.

After once more waiting a few more days, the player will be able to initiate the third and final personal quest for father Petrus. This one is a bit closer to home in that it heavily revolves around De Sardet's past as well as their mother.

There has been mention of Petrus knowing the player since they were a child, though, it was not mentioned until this point that Petrus interacted with De Sardet's parents in such a familiar way. This quest may not be able to lead to a romanceable situation, but it will lead to answers about the player character's origin and what happened to their mother.

Quest Checklist For Sins Of Father Petrus

  • After speaking with Petrus to start the quest, go to New Sérène's docks
  • Speak to admiral Cabral to gather the first bit of information
  • Then head to Hikmet to speak with captain Lisandro for the next piece of the puzzle
  • Travel to the village of Vignamri and speak with Ullan to learn of someone with better information
  • Speak to the other villagers nearby to get a lead on this knowledgable person's whereabouts
  • Follow the quest marker to a spot where the player will find a woman being attacked by beasts
  • Protect the woman by slaying the beasts
  • Defeating all the enemies will cause a cutscene to play and complete the quest

Quest Rewards For Sins Of Father Petrus

  • 1600 XP
  • +3 Reputation with Petrus
  • Increase Relationship Level with Petrus

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