Every NPC Location in Sailor Piece — Quest Givers, Crafters, Trainers, and Bosses

Sailor Piece scatters dozens of NPCs across more than a dozen islands, and each one serves a distinct purpose — handing out quests, selling weapons, teaching fighting styles, crafting boss-summoning items, or training Haki. Losing track of who stands where is easy, especially once you start island-hopping in the late game. Below is a comprehensive reference for every NPC currently in the game, organized by function and island.

All Quest NPCs

Quest NPCs are your primary source of Gold, Gems, and EXP throughout Sailor Piece's leveling curve. Each one covers a specific level range, and you'll move from island to island as you progress. Two special quest NPCs — Cupid and the Demonite Core Quest NPC — sit outside the normal leveling chain and unlock unique rewards.

All Mastery NPCs

Mastery NPCs let you boost a specific weapon's damage — sometimes by as much as +35% — and unlock the powerful F Skill for certain swords. You must already own the relevant weapon (or meet the trait requirement) before you can accept their quests.

All Weapon Seller NPCs

Weapon sellers either sell swords outright for currency or craft them from materials you've gathered. If you're looking for a specific blade, here's where to go.

All Melee Trainer NPCs

Melee Trainers teach you fighting styles, which form one of the most important parts of any build. Many of them stand on rooftops or elevated structures, so you'll need to jump or fly to reach them.

Haki Trainers

Three separate NPCs teach the three types of Haki. Each one lives on a different island, and you'll need to meet their level or stat requirements before they'll train you.

Crafting and Utility NPCs

Crafters turn raw materials into boss-summoning keys and domain shards, while utility NPCs handle fruit rolls, enchanting, and stat rerolls. Knowing exactly where each one stands saves a lot of aimless wandering.

Dungeon Pieces and the Dungeon Quest

Before you can spawn dungeons, you need to collect six ancient puzzle pieces scattered across the map and then defeat 25 bosses. The Dungeon NPC on Dungeon Island gives you the quest once you hit level 5,000. Every puzzle piece spawns in a fixed location for all players.

After collecting all six pieces and defeating 25 bosses of any type, you unlock the Dungeon Spawner. You can then enter dungeons using a Dungeon Key, which drops from world bosses and chests. The two currently available dungeons are the Shadow Dungeon (Cid Dungeon, featuring the Shadow boss at waves 5, 10, and 15) and the Rune Dungeon (no boss, but Runes can drop from each defeated NPC). Both offer easy, medium, hard, and extreme difficulty tiers across 15 waves.

Boss Summoner NPCs and Key Farming

Several bosses in Sailor Piece don't spawn naturally — you summon them at specific NPCs using keys, currency, and gems. The Boss Summoner on Boss Island handles Saber (1× Boss Key + 100K Cash + 175 Gems), Qin Shi (3× Boss Key + 250K Cash + 400 Gems), Ichigo (5× Boss Key + 350K Cash + 600 Gems), and Gilgamesh (1× Divine Grail + 500K Cash + 500 Gems). Separate summoner NPCs on Shinjuku Island handle Strongest of Today (1× Limitless Key) and Strongest in History (1× Malevolent Key), while Rimuru is summoned on Slime Island with a Slime Key and Anos on Academy Island with a Calamity Seal.

Boss Keys drop from all non-boss enemies, chests, quests, and the Merchant. A popular farming method is to use the Quake Fruit's C skill on Shinjuku Island to wipe both packs of Strong Sorcerers and Curse enemies simultaneously. Limitless Keys come from the Gojo boss at Shibuya Station and Strong Sorcerer mobs on Shinjuku Island, while Malevolent Keys drop from Sukuna and Curse enemies in the same areas.

Every boss also has a built-in pity system. You're guaranteed a rare drop on every 25th boss kill, so a common strategy is to defeat 24 easy bosses and then fight the one you actually need items from to trigger the pity reward. You must deal at least 10% of a boss's total HP to qualify for any drops at all.

Sailor Piece keeps adding islands and NPCs with each major update, so bookmark this reference and check back when new content drops. Keeping a mental map of where each NPC stands — especially the crafters and boss summoners — will save you significant time as you push into the endgame grind.