So I've lost my talisman. I've been looking for ages, and I still can't find it. It was only a little thing I bought while carrying out a mission in Yan, but the local said it'd been blessed at the temple. Someone tells me I can go and ask Purestream. Purestream... I'm not too familiar with the name. Maybe it's a new operator handling lost and found at Logistics?
It's not in my dorm...
Or the meeting room...
I find her at the baths. She's just finished repair work, and now she's–well, bathing. I can even hear her singing from outside the door. It's loud, clear and perfect... but don't you feel icky bathing for that long?
"Sorry, sorry, I know I kept you waiting."
"Rhodes Island's sewage work is up to the task, but they've really been overlooking cleaning the filtration system itself. The vast majority of areas have blockages. You need to get into them frequently! All I can do is hang on until the whole cleaning job's done before I... heheh."
"Is this your charm? Come and take a look."
The girl absentmindedly talks as she opens a bag. Aside from my talisman, I can see marbles, hair clips, test tubes, and even an ammo magazine...
"Did you... find all of these in the sewage filtration system?"
"Yup. It was covered in mud when I found it, absolutely filthy, but I've already thoroughly cleaned it."
I'm about to ask "how could it have gotten there," but I hold it back. I should be asking myself that...
Later, I'm chatting with a friend in Engineering about the landship breaking down and getting repaired. Nobody would've called the problem being the sewage systems. Operator Purestream took on the cleanup task all alone after only a day of her job, and she'd spent two whole days inside the filthy inner filtration system... blockages in a few specific areas were the "main culprits," all the "treasures" we'd accidentally lost and couldn't find. I remember Purestream sort of shyly smiled when I told her thanks, and she just urged me to "take care from now on," giving me a precautions while she was at it. Water could flush everything away, so we'd gotten used to just twisting taps and pushing on valves, simple as that. It was precisely because water could flush everything that we never knew how dirty it'd gotten, somewhere out of our sights.
I hear Purestream's in charge of Rhodes Island landship sewage work now. I didn't know what she liked, so all I could figure was to buy some scented soap and send it to her. I only found out later she'd gotten piles of it by that point. I guess I wasn't the only one who wanted to tell her thank you.

–As related by an operator, extracted from a periodic evaluation of Purestream following her onboarding