The short version
The Butler sweeps the floor and looks harmless. It is harmless, right up until someone is alone with it.
Stay with the crew. It turns hostile against isolated players, and killing it releases a swarm of hornets.
What the Butler is
It is a humanoid entity with a blunt, fish-like face, and it carries a broom that it sweeps the floor with.
That sweeping is genuine behaviour, not a disguise. It wanders the interior cleaning as it goes.
The knife is the surprise. It keeps one hidden, and it uses it when the situation turns in its favour.
The trigger is being alone
This is the whole mechanic, and it is unusually specific.
Around several employees it stays passive. It keeps sweeping and ignores the crew.
Against an isolated employee it turns hostile. It pulls the hidden kitchen knife and attacks.
The isolation does not have to be far. A diver one room away from the group is often enough.
That makes this one of the few entities where the counter is social rather than tactical. Staying with somebody solves it.
Why killing it is a bad trade
Crews kill Butlers because they look easy. The result is worse than the problem.
It inflates and pops when killed, and it drops the knife as loot.
It releases a swarm of Mask Hornets on death. Those hornets attack nearby employees, and a swarm inside a facility is a real problem.
So the sequence is: kill a passive entity, get a knife, and inherit a swarm. The knife does not pay for the hornets.
Leave it sweeping. It is one of the few things in a facility that is genuinely fine to ignore.
When you might have to kill it
There are situations where it has to go.
If it is between the crew and the exit and cannot be walked around.
If it has already turned hostile on someone who cannot get back to the group.
If the crew is leaving anyway and the swarm will not matter, because nobody will be in the facility to meet it.
If you do kill it, do it in an open space and move immediately afterwards. Do not stand over the body sorting loot while the hornets come out.
The knife
The dropped knife is a usable weapon, and it is the one reason crews consider the trade.
It is light and it does damage. For a crew that needs a weapon and has none, that has some value.
Weigh it against the swarm. Most crews should take the knife from a Butler someone else killed, or not at all.
Working around one
The practical approach in a facility with a Butler present:
Keep pairs. Two divers is enough to keep it passive.
Do not send one person to a distant room. If a room needs checking, two divers check it.
Call out when you are alone. A diver who has drifted should say so and move back.
Give it space anyway. Passive does not mean invisible, and cornering it is still a bad idea.
This is the same discipline that handles several other entities. The Butler is simply the clearest case of it.
Where it appears
It is not common, and it favours specific destinations.
The highest published base spawn chance is on Dine, followed by Artifice and Rend. Crews running the cheap starting moons will rarely see one.
That means most crews meet their first Butler on a harder moon, often while already split up. It is worth knowing the mechanic before that day arrives.
Mistakes that get people killed
- Splitting up in a facility that has one. Isolation is the trigger.
- Killing it for the knife. The hornets cost more than the knife pays.
- Standing over the body after the kill. Leave before the swarm arrives.
- Assuming passive means dead. It is passive only while you are not alone.
- Sending one diver to check the far room. Send two.
Reading it in the bestiary
The Butler is one of the 16 indoor entities in the monster database. That table lists every entity with its location and hazard rating where the source data provides one.
Our source data does not populate hazard or health fields for it. We describe behaviour and published spawn chances rather than invent numbers.
Related guides
- How to beat Mask Hornets — what comes out when a Butler dies.
- Indoor monsters guide — all 16 facility entities and how they differ.
- Co-op guide — the pairing habit that keeps this one passive.
- Equipment guide — why the dropped knife is not worth a swarm.