All Special Quest NPC in Sailor Piece Guide, Rewards & Info
Progression in Sailor Piece is not only about leveling up or collecting better weapons. Many of the strongest upgrades in the game actually come from Special Quest NPCs scattered across different islands. These NPCs provide unique questlines that unlock powerful buffs, special skills, and rare items that can greatly improve your character. Also check out our Sailor Piece Codes for more rewards!
Some quests are simple tasks like defeating enemies or playing for a certain amount of time, while others require long grinding sessions, dungeon clears, or boss fights. Because of that, knowing where each NPC is located and what rewards they offer can save you a lot of time while progressing through the game. Below is a complete guide covering all Special Quest NPCs in Sailor Piece, including their locations, quest requirements, and rewards.
Santa Quest NPC
The Santa NPC is part of a holiday event questline that rewards themed cosmetic items.
Quest Requirements
Holiday Spirit Quest 1
- Play for 30 minutes
Holiday Spirit Quest 2
- Kill 125 NPCs
Holiday Spirit Quest 3
- Find 2 Gingerbread on Christmas Island
Rewards
- Santa Hat
- Santa Helper
These items are mostly cosmetic but are popular among collectors during seasonal events.
Ragna Mastery NPC
Location: Snow Island
This mastery questline strengthens the Ragna Sword, making it significantly stronger.
Quest Requirements
Ragna Mastery 1
- Kill 750 NPCs
Ragna Mastery 2
- Deal 400 million damage
Ragna Mastery 3
- Defeat 50 players
Ragna Mastery 4
- Take 85 million damage
Ragna Mastery 5
- Defeat 100 bosses
Reward
- Ragna Sword damage increased by 35%
This is one of the strongest weapon mastery upgrades for players who use the Ragna weapon.
Haki Trainer
Location: Snow Island
Before starting the training, you must prepare:
- 250,000 Coins
- 250 Gems
Haki Questline
Haki Trainer 1
- Kill 250 NPCs using Combat
Haki Trainer 2
- Use Combat Z skill 100 times
Haki Trainer 3
- Perform 1000 punches using Combat
Reward
- Armament Haki
Armament Haki allows your character to deal stronger damage and improves combat performance.
Observation Haki Trainer
Location: Desert Island
Requirements
- 250,000 Money
- 300 Gems
This NPC unlocks Observation Haki, which improves your ability to dodge attacks during combat.
Conqueror Haki Trainer
Location: Shibuya Station
Requirement to Start
- 1 Conqueror Fragment
Training Requirements
- Reach Level 40 Armament Haki
- Reach Ascension Level 5
- Reach Level 25 Observation Haki
- Kill 500 NPCs while Armament Haki is active
- Dodge 500 attacks using Observation Haki
- Defeat 200 bosses
- Complete 25 dungeons
Reward
- Unlock Conqueror Haki
- Permanent 25% Damage Boost
This is one of the most powerful upgrades available in the game.
Aizen Mastery NPC
Location: Hueco Mundo
This mastery questline improves the power of Aizen’s Sword.
Quest Requirements
Aizen Mastery 1
- Deal 750 million damage
Aizen Mastery 2
- Defeat 50 players
Aizen Mastery 3
- Kill 1000 Hollows
Aizen Mastery 4
- Defeat 75 bosses
Aizen Mastery 5
- Defeat Aizen 25 times
Reward
- Aizen Sword damage increased by 30%
Shadow Mastery NPC
Location: Starter Island
This questline strengthens the Shadow Sword.
Quest Requirements
Shadow Mastery 1
- Deal 1 billion damage
Shadow Mastery 2
- Kill 1250 NPCs
Shadow Mastery 3
- Defeat 150 bosses
Shadow Mastery 4
- Clear CID Dungeon (Easy) 10 times
Shadow Mastery 5
- Clear CID Dungeon (Medium) 10 times
Shadow Mastery 6
- Clear CID Dungeon (Hard) 10 times
Reward
- Shadow Sword damage increased by 30%
- Unlock F Skill
Shrine Domain Shard NPC
Location: Shinjuku Island
This NPC allows players to craft a Shrine Domain Shard.
Materials Required
- 6 Cursed Talisman
- 2 Infinity Essence
This shard is needed for special mastery upgrades.
Infinity Domain Shard NPC
Location: Shinjuku Island
Used to craft the Infinity Domain Shard.
Materials Required
- 6 Energy Shard
- 2 Cursed Flesh
Strongest In History Mastery NPC
Location: Shinjuku Island
Requirements
- 1 Shrine Domain Shard
- Malevolent Trait
Reward
- Sukuna V2 damage increased by 30%
- Unlock F Skill
Strongest Of Today Mastery NPC
Location: Shinjuku Island
Requirements
- 1 Infinity Domain Shard
- Infinity Trait
- 3 Blue Singularity
Reward
- Gojo V2 damage increased by 30%
- Unlock F Skill
Cupid Quest NPC
Location: Valentine Island
This event quest provides special Valentine-themed rewards.
Quest Requirements
Cupid Trial Quest 1
- Kill 350 NPCs
Cupid Trial Quest 2
- Play the game for 30 minutes
Cupid Trial Quest 3
- Find 3 Love Pieces on Valentine Island
Rewards
- Valentine Heart
- Cupid’s Chosen
Rimuru Mastery NPC
Location: Slime Island
Questline
Demon Lord Evolution 1
- Defeat 15 Hard or Extreme Rimuru Bosses
Demon Lord Evolution 2
- Obtain Slime Race
Demon Lord Evolution Final
- Kill 10,000 NPCs
Reward
- Rimuru damage increased by 30%
- Unlock F Skill
Demonite Core Quest NPC
Location: Academy Island
Quest
- Find 2 Demonite Fragments hidden around the island.
Reward
- Allows players to obtain Calamity Seal from mobs.
Shadow Monarch Mastery NPC
Location: Starter Island
Questline
Shadow Monarch Evolution 1
- Win 10 Double Dungeons on Hard or Extreme
Shadow Monarch Evolution 2
- Obtain Monarch Clan
Shadow Monarch Evolution 3
- Defeat 25 Shadow Soldiers inside Double Dungeon
Note: Shadow Soldiers spawn randomly during dungeon waves. Higher difficulty increases the spawn chance.
Reward
- Shadow Monarch damage increased by 30%
- Unlock F Skill
Special Quest NPCs are a major part of progression in Sailor Piece because they unlock powerful buffs, new skills, and weapon upgrades. While some quests are quick to complete, others require serious grinding and multiple dungeon runs.
If you want to reach the strongest builds in the game, completing these special questlines is essential. Focus on the quests that improve your main weapon or ability first, then continue working through the remaining NPC quests to maximize your overall damage and progression.
Sailor Piece