By the time I reached Rogue Protocol, I thought I had a fairly good understanding of Murderbot.

It was competent, sarcastic and perpetually irritated by human beings. Every novella seemed to follow a familiar pattern. Murderbot would arrive somewhere intending to mind its own business. Then a conspiracy would emerge, people would find themselves in danger and Murderbot would reluctantly save everyone while complaining about it.

The third novella begins in much the same way.

Murderbot is still trying to gather evidence against GrayCris, the corporation responsible for the events of All Systems Red. The evidence already exists, but not enough of it. To strengthen the case, Murderbot travels to Milu, home to an abandoned terraforming facility that may have been used as a cover for GrayCris’ real activities. The plan is straightforward. Investigate the facility, collect proof and leave.

Anyone familiar with Murderbot can probably guess how well that plan works.

Before reaching the facility, Murderbot encounters a small survey team heading in the same direction. Among them is Don Abene and a human-form bot named Miki. Like ART in the previous novella, Miki quickly became one of the most memorable characters in the book. But unlike ART, Miki is not intimidating. It is cheerful, trusting and relentlessly friendly.

Murderbot finds this deeply suspicious.

The contrast between the two is fascinating. Miki assumes people are fundamentally decent. It likes its humans and its humans clearly like it. Don Abene treats Miki as part of the team rather than a piece of equipment. They consult it, trust its judgement and include it naturally in conversations. Nobody seems particularly interested in drawing a line between the humans and the bot.

What makes this even more striking is that Miki is entirely artificial.

Murderbot is a construct, part machine and part organic tissue. The corporations that manufacture SecUnits have spent generations building legal and moral justifications for treating them as property. Miki offers no such ambiguity. There are no human components hidden beneath its exterior. It is all metal, software and artificial intelligence.

Yet nobody seems surprised that Miki belongs at the table. Murderbot notices the difference immediately. And it makes him extremely uneasy.

One of the recurring themes running through the series is freedom. In All Systems Red, Murderbot hacked its governor module and escaped direct corporate control. Yet freedom has remained a surprisingly complicated concept ever since. At the end of the first novella, Dr Mensah offered Murderbot sanctuary on PreservationAux. It could leave its old life behind. It would no longer be a rogue SecUnit hunted by corporations. A chance that it could finally live among people who respected it.

Murderbot ran away from that chance.

The decision makes somewhat sense if you spend some time inside its head. PreservationAux would still require a human guardian legally responsible for Murderbot’s actions. The governor module would be gone, but a human being would occupy a similar position. After a lifetime of ownership, Murderbot struggles to see the distinction. Freedom that depends upon somebody else’s supervision feels suspiciously close to another form of control. It does not want to become Dr Mensah’s pet, no matter how kind Dr Mensah might be.

Then it meets Miki. And suddenly another possibility appears. Miki is neither owned nor isolated. It belongs to a community without being reduced to property. Don Abene cares about Miki without controlling it. Miki trusts its humans without surrendering its identity. The relationship contains affection, responsibility and loyalty, but very little ownership.

The distinction between the two forms of responsibility is subtle. But it is deeply human.

Murderbot has spent much of the series defining freedom as escape. Escape from corporations, escape from governor modules, escape from ownership. And Miki suggests that freedom might involve something more than simply being left alone. Independence matters, but friendship matters too. A life without ownership is one thing. A life without connection is something else entirely.

Of course, being Murderbot, it is not prepared to admit any of this.

Instead, it focuses on the investigation. The abandoned facility contains exactly the sort of secrets Murderbot expected to find. There are attempted murders, corporate cover-ups and enough danger to remind us that GrayCris remains as ruthless as ever. Much of the novella consists of Murderbot trying to gather evidence while simultaneously keeping a group of increasingly endangered researchers alive. The action moves quickly, and Martha Wells never forgets that these books are supposed to be entertaining.

And they are fun to read.

One of the pleasures of Rogue Protocol is watching Murderbot improvise its way through increasingly complicated situations while maintaining a running internal commentary about how inconvenient everyone is. The combination of competence and irritation remains one of the funniest things in the series. Even when the stakes rise, the humour never disappears.

Yet what stayed with me after finishing the book was Miki. Across these three novellas, Martha Wells has introduced a new memorable character in each one. First there was Murderbot itself. Then there was ART. Here, it is Miki. A cheerful bot who somehow manages to get under Murderbot’s armour without ever trying to.

Murderbot insists that it prefers distance. It insists that humans are exhausting. It insists that attachment creates unnecessary complications.

Its actions keep telling a different story.

Again and again, Murderbot risks itself for people who are not its responsibility. Again and again, it becomes emotionally invested in outcomes that should not matter. Miki simply makes that contradiction impossible to ignore. By treating connection as normal, Miki forces Murderbot to confront possibilities it has spent most of its life avoiding.

For a character obsessed with freedom, that may be the most unsettling discovery of all. After meeting Miki, PreservationAux no longer looks quite the same.