Maybe he also forgot he has memory issues LOL
I reckon from his situation that he probably dont know how to read let alone write lol
Doesn't*, cuz like i mean nia is def like an orphan or soemtheng and he grew up with these abuses and discriminations, considering hes a goldfish and low stat he def doesnt know how to read and write probs cuz he such a cute little dummy prescious idiot
In the first few chapters, I noticed the side of the wall next to his bed is filled with sticky notes. Maybe he does write them down hence he doesn't forget after he wakes up, but probably still forgets most of them during the day when he is working(he doesn't seem to be bringing a note and pen or isnt allowed to)
I think he does know how to read because there are tons of books in his room.
Who knows maybe those aren't notes and are pictures, and I don't think they'll prohibit him to bring a booknote along because they depend on each other's work to keep the house running, so everytime he's behind on a chore, they're behind as well because they need him in other places, that's why they get mad at him when he doesn't finish kr do things on time.
There's also the possibility that the books in the room aren't his, maybe the room was used as a small deposit before he arrived and they just left the books there, but the workers are very careful with their master's stuff, I don't think they will leave his things there with the "stupid" goldfish.
If he has memory issues why doesn't he write things down? I got some memory issues as well, so I write almost everything down and put the notes somewhere I know will always be on my sight or I'll forget where I put the notes as well lol. If I'm moving around then I put the paper in a pocket with a part of the paper a bit outside so that I don't forget that I have notes on me and in which pocket.