Buy story-unlocked Queen metals

Coco’s shop at Home Base; check Murasame’s weapon and Blood Veil upgrade screens for the required metal tier.

Before you go

At Home Base, inspect the upgrade you want through Murasame before shopping.
Write down or remember the metal tier and quantity shown for that upgrade.
Speak with Coco and review her current inventory for Queen’s Iron, Steel, or Titanium.
Compare the displayed stock against your exact requirement and available Haze.
Buy only the amount needed for the planned upgrade, if it is stocked.
Return to Murasame and confirm the upgrade can now be performed with your materials.
If the required tier is Queen Tungsten, pursue an appropriate late-game pickup or Depths reward instead of waiting on this lower-tier shop routine.

Coco’s inventory can change with progression, so recheck after advancing the story rather than assuming a fixed full stock.
Use Murasame’s screen as the authority for the material tier; weapon and veil needs can differ.

Limited by Coco’s available stock and your Haze. Recheck after progression, but do not treat any purchase as an unlimited metal farm.

Buying metals before confirming the upgrade requirement: inspect Murasame’s service first.
Expecting Queen Tungsten from the lower-tier shopping plan: use late Provisional Government locations or eligible Depths instead.
Spending Haze on surplus stock: purchase for an identified upgrade, then stop.

Stop once the required upgrade is funded or Coco lacks the needed tier; switch to a supported late-game Queen Tungsten source if that is the target.

Sources & fact checks

Open a guide to find other locations and see what the item is used for.

Weapon and veil upgrade metals

Coco’s expanding shop can fill gaps in lower-tier Queen metals when story progress unlocks the stock you need.