Billy?

Start location: Castilla, Base 1

1. 1

   Stage 1

   Recorded quest level 110

   Speak with Billy.

   Where

   Castilla, Base 1

   NPC

   Equipment Merchant, Billy

   Map coordinates

   X -2148 · Y 5997

These are recorded stages and NPC positions. Appearance and access can depend on your progress; coordinate units are the game's source coordinates.