Red Texting is an interesting idea I hadn't thought of. I now want to see Remilia as Beatrice and Reimu as Battler in a fangame or something. It would be awesome.
Yeah, I only thought of that recently, but I wonder why I haven't seen examples of this before.
Red text is different from fate manipulation, but they are both truths.
Have Remilia ever actually used her powers?
I know that she can manipulate fate, but I've never seen a situation that made it explicit that she used said power. The only thing I've really seen her using was Red Magic, the Gungnir spear and things of the nature.
No, we never see that. We only see reported events of what could be Remilia using her powers. For what its worth, Remilia always gets what she wants in the mangas, 3 Fairies, Silent Sinner in Blue, etc.
If characters picks fights with Koishi because of her popularity, then that means she was indeed not forgotten, which makes the above passage contradictory. So I don't know anymore.
I'm thinking more on the lines of her being not memorable and having no presence. So, while you can visibly see her, you wouldn't notice her, because of her lack of presence. You also don't remember her, because it is ordinary, kind of like trying to remember what you ate a week ago? If it isn't anything special, you probably don't remember.
However, when she was popular that is not true anymore. So, even if she doesn't have a presence and would not normally stand out, her popularity is making her stand out.
Hopeless Masquerade is special because Koishi has Kokoro's mask of hope. Which she picked up some time before the story started. So technically she's borrowing a facet of Kokoro's power to become popular. Her ending explicitly tells us that
I don't agree with the idea that her normal state will cause her to be forgotten. This is how I see it, the mask of hope allowed her to have emotions, but it did not cause her to have any more presence. What I mean is that it gave her hope, but it doesn't make her any less forgettable.
I believe this is the case, because none of the characters could see her. However, when she got popular, other characters were specifically looking for her. So, whether she has a presence or not would not stop them from finding her.
As Koishi's story goes along, she gets more popular. After Futo, quite a bit of people were able to see her.
Edit: I should not say none, since the final boss was able to find Koishi during the final boss's route.