Ghost (NPC), Blox Fruits Wiki

Not to be confused with the enemy and fruit, Ghost (enemy) / Ghost (fruit) The Ghost NPC is part of the puzzle to get the Soul Guitar, players have to talk to him after completing the Signs part of the puzzle, which will start the next part of the puzzle. When a person who hasn't started the Soul Guitar Puzzle or hasn't completed the right part of the puzzle, prompts to start a conversation with it, it won't say anything. The Ghost NPC is located at the Haunted Castle in the Third Sea.

Blox Fruit Factory Time

How to Get the Soul Guitar in Blox Fruits