Lily loved Trundlebot.

She knew she was very lucky to be allowed on the factory floor, because usually the children of the colony weren’t allowed anywhere near it. The fact that her father was the manager of the complex, overseeing the various automatons’ duties and making sure everything continued to run smoothly on a daily basis, meant that she enjoyed certain privileges, though: privileges that she didn’t take for granted.

The other children in her class sometimes teased her for spending so much time in the factory, but she knew that secretly they were jealous; she overheard them sometimes talking about the robots, and how interesting they were, and how they’d love to get up close to see how they really worked. But no-one but Lily was allowed to do that. She’d have let them come with her if they’d only ask — her father often said that she could bring her friends — but no-one ever did, and she wasn’t sure she wanted to.

That’s because Lily didn’t really have many friends. She’d always been somewhat distant, generally preferring the company of a book from Old Earth or a headset filled with classical music. But her father had seen how much she’d come to life the first time he’d brought her to the factory, and so he’d made special arrangements for her to be able to come and go as she pleased, so long as she was careful.

Trundlebot was particularly special to her, because Trundlebot was the first robot she’d encountered up close. Trundlebot wasn’t its real name, of course, but Lily had quickly christened the mechanical giant that after seeing it trundling leisurely around the factory floor, carrying things from one place to another as if it had all the time in the world.

Trundlebot wasn’t the most efficient or advanced model in the factory, but Lily’s father had kept it around for as long as it remained functional, since he knew how much the ageing robot meant to his daughter. Even as the rest of the factory was staffed by shiny white plastic automatons with more convincing humanoid forms, Lily still found herself fascinated by the browning metal of Trundlebot; the stereoscopic cameras that formed its eyes; its spindly, awkward yet vaguely humanoid arms; the caterpillar tracks upon which it made its way around the factory.

Lily wasn’t so naïve as to believe that Trundlebot knew who she was — she was nearly ten years old, after all; far too old for such childish fancies — but that didn’t stop her thinking of it fondly and always spending most of her factory floor visits following the automaton around. Trundlebot was the closest thing she felt she had to a true friend; often, when she knew no-one was watching her, she’d talk to it, spilling forth her deepest, darkest secrets that she didn’t even tell her father. She found the experience therapeutic; Trundlebot never judged her for the things she said, and she found sweet release from offloading her emotional baggage in this way.

One day, as spring was just starting to show itself in the colony, Lily headed to the factory after school as she always did, and immediately sought out Trundlebot. It didn’t take her long to find it, but something didn’t seem quite right: it didn’t seem to be “trundling” so much as rolling around the factory floor in a somewhat determined, almost aggressive manner, with a clear purpose. It had always had that sense of purpose about it — it always got the job done, after all — but there was also the distinct impression that it would do things at its own pace and wouldn’t be rushed. It reminded Lily in many ways of an elderly man pottering around his garden; plenty of things to do, and all the time in the world to do them one at a time.

Today, though, Trundlebot seemed to be moving with unusual efficiency and speed. It didn’t look at all right, and it concerned Lily somewhat.

“What do you think?” said her father, walking up behind her and placing his hand gently on her shoulder.

“What did you do to him?” asked Lily. “He’s… different.” Lily always personified Trundlebot as a “he”, despite the robot technically being completely genderless.

“We upgraded its drive components,” said her father. “They were getting a little worn, so we took the opportunity to put some more efficient parts in there.” Here he lowered his voice. “Plus between you and me, the bosses have been getting on my back to get it sorted out for a while. It’s the weak link in the process.”

Lily did not like this at all, but she just pouted and said nothing. Despite the new-found spring in its step, it was still Trundlebot, after all. She spent her usual few hours following it around the factory floor, this time having to jog to keep up with her mechanical companion. After a few short minutes, she found herself enjoying the exercise, and it wasn’t until she was on her way home that she started to think about the old Trundlebot and how the new one differed from it.

Lily continued to visit the factory every day, and eventually became accustomed to her robotic friend’s new-found burst of almost youthful vigour. But then something else changed, and she found herself once again feeling a little strange.

This time around, Trundlebot’s spindly arms had been replaced with what appeared to be more heavy-duty lifting apparatus: large metal claws on the end of thick, almost muscular-looking arms wrapped in flexible plastic tubing, like that seen on a vacuum hose but about five times the diameter. Lily watched it from a distance for a little while; its new arms allowed it to lift much heavier, more cumbersome objects, and when combined with its new drive parts, it was doing so with remarkable efficiency.

“What did you do now?” she said, sensing her father walking up behind her.

“Well, I think you can see,” said her father. “It’s been working out.” He chuckled.

Lily pouted again, and said nothing. Her father, sensing something amiss, continued.

“We’ve been starting to deal with much heavier materials now that the Arcology project is underway,” he said. “It made sense to upgrade its lifting apparatus, as it just wouldn’t have been able to cope otherwise.”

Reluctantly, Lily found herself forced to agree; better that Trundlebot could continue doing its job than be consigned to the scrap-heap simply because it wasn’t able to do the work any more. As it passed by, its stereoscopic vision cameras looked right at her, and she felt like she had made “eye contact” with the machine; it was still her friend in there.

Once again, the weeks passed by, and Lily gradually became accustomed to Trundlebot’s new, more physically imposing form. On one occasion, her father took manual control of Trundlebot with the override device — essentially a remote control for any of the robots on the factory floor — and made it pick her up in its big, powerful arms. She was delighted, and found herself with an uncontrollable desire to fling her young, skinny arms around the cold, metallic neck of the automaton; it wasn’t quite a hug, but it was near enough.

Summer came, and the colony enjoyed a heatwave. It was delightful weather; the sun shone in clear skies, and it was pleasantly warm without being uncomfortable. Even Lily, who generally preferred to stay indoors if at all possible, spent some time out in the sun, though she quickly found that her pale skin was more inclined to burn than tan.

One particularly hot afternoon, Lily went to the factory in the hopes of cooling off. The air conditioning inside the building usually kept things pleasantly temperate all year round, but today she was surprised to discover that it was almost as hot inside the factory as it was outside. Still, the shade inside the building afforded some respite from the rays of the sun, at least; the skin on her arms was still a little tender and was peeling in a few places, so she had no particular desire to remain outside.

She looked around for Trundlebot as usual, but was surprised to discover that it appeared to be nowhere to be seen. She walked around, calling out its “name” a few times before realising how foolish that was and continuing her search in silence. All she saw were the more modern humanoid-form robots going about their business; they ignored her for the most part, only acknowledging her presence by stepping around her when she was directly in their path as they proceeded to their next task.

Eventually, eyes widening, she saw a figure that was simultaneously familiar and strange to her. There was the base with the caterpillar tracks; there was the body of browning metal; there were the big, powerful arms that she had grown used to, but atop the body was not the familiar cuboid “head” sporting the stereoscopic vision cameras she knew as Trundlebot’s “face”; instead, there was a white plastic ellipsoid atop the body.

With a mechanical whir, the robot turned around and revealed the front of its new “head”; a black screen sporting glowing green symbols clearly designed to resemble a face. As it turned to face Lily, the symbols changed to an approximation of a smiling, cheerful face, and then something very surprising happened.

“Hello. Lily,” said the robot in an awkward synthesised voice. Lily didn’t respond. She was frozen to the spot, but the robot was starting to advance on her; slowly this time, somewhat more akin to Trundlebot’s old pace.

As the robot got close enough to have grabbed Lily with its arms, she blinked away sudden tears, shook her head and took a step back. The robot advanced again, the smiling face still glowing on its screen.

“Li. Ly,” it said again.

“What do you think?” said her father, who had seen her come in earlier but had only just caught up to where she had ended up. He had a smile on his face. “Not strictly by the book, but I thought you’d like it.”

The robot stopped in front of her. She looked at its still-smiling face, then her lip started to quiver, tears started to fall from her eyes and an uncontrollable sob escaped her.

Then she ran; past the big factory machines, past the oblivious humanoid robots, out into the heat of the summer’s day. She kept running until she was no longer anywhere near the factory; she had come to the main recreational area of the colony, an area of lush greenery that sported a large tree she had spent many a time sitting under contemplating the meaning of life in as much depth as an almost-ten-year-old can muster.

She headed straight for the tree and sat down in the shade, her back resting against the trunk. She hugged her knees close to herself, then buried her head in them and began to cry in earnest.

She wasn’t stupid. She knew why all this had happened. She knew that Trundlebot had been on borrowed time for a long while now, and that her father had kept it around to appease her for as long as possible. She knew that this last modification was done entirely with her in mind, as a way to give her a true friend rather than an unthinking, unfeeling automaton who saw the world through primitive stereoscopic cameras.

But she found herself resenting her father for that. He had tried to make Trundlebot better: a better worker; a better robot; a better friend for Lily. But in doing so he had gradually eroded the things that made Trundlebot Trundlebot in Lily’s mind, until now there was all but nothing left of the robot she had loved.

She wept for her lost mechanical friend with an intense sadness she hadn’t felt since the loss of her mother a year ago. The feelings were all too familiar: a sense of abandonment, of things being beyond her control, of the universe being just so damned unfair all the time. She wept until there were no more tears to cry, then she watched the sun set, the clear blue skies giving way to pinks and golds, and eventually fading away completely to reveal the starry sky. She had never felt more alone and insignificant.

Lily never went back to the factory after that, and she never quite forgave her father; but Trundlebot as he once was lived on in her memory, and would remain there for as long as she lived.