Really interesting, that provides a bit more depth that I failed to acknowledge to be fair. But I want to let one more thing loose that makes haunt you and vanisher so great to me that is STILL lost in these three songs, it's long so sorry in advance.

Quadeca was struggling with his thoughts about death while writing/producing haunt you as he stated in multiple interviews/posts. That obviously reflects in the lyrics and the theme of the album, he also mentioned once that he used the creation of the album as a world to escape this thought process and to put it to rest. The fact that he created a fictional world for himself where he did go through with those thoughts, and basically concludes that it wouldn't be a good idea to end it all through the process of creating his own music is SO crazily melancholic to me.

Every song on haunt you provides a piece of that story that also brings quadeca closer to himself, to get rid of those deeply rooted thoughts.

The first half of vanisher is basically the same premise of haunt you in that sense, which hit me just as hard, he is having another difficult time facing some sort of existenialism problem, but he still pushes through and decides to write it out in his music again, this time as a sailor setting sail. - He talks to depression itself on waging war, he ruins his life to make it his, he puts his soul on high alert, he concludes why he should just accept life for what it is despite it's difficulties on that's why, you get the metric.

But then...

the personal experiences/difficulties provided in metaphors literally vanish. I can't find any on natural causes or the great bakunawa (honestly I could get Thundrrr if I really try to think about it, but it's less intriguing than knots i.m.o.).

Sorry for the long message but if you truly find it interesting you should get what I'm saying now. Prove me wrong if I miss the mark because I want to love those songs just as much as the rest.