You’re probably asking about which Arknights: Endfield operator consumes Fire stacks. Based on the combat guides I found, the Fire-related stack mechanic is tied to Fire reaction damage and team synergy , and the clearest example named in current guides is Wulfgard , who is described as a Fire-reaction damage operator in fire-focused teams.

What that likely means

In Endfield, “consume stacks” usually refers to an operator or reaction that uses up a status stack to trigger bonus damage or an effect. The guides I found explicitly describe a similar stack pattern for Physical reactions, where Crush or Breach consume Vulnerable stacks.

Fire-stack wording

I did not find a source that cleanly says “this exact operator consumes Fire stacks” in a universal, official way. The current public discussion instead points to fire-team operators like Wulfgard and fire infliction stacking behavior in enemy or reaction discussions, not one single confirmed “Fire stack consumer” for all cases.

Practical answer

If you mean the operator most associated with consuming Fire-related stacks in current guides , the best match is Wulfgard. If you mean a different stack system, like an enemy Fire Infliction stack or a specific reaction, the mechanic may be context-specific rather than tied to one operator.

Quick note

If you want, I can narrow it down to:

  • operator build / skills
  • fire team comps
  • the exact stack mechanic name