>>4679
The mansion is a system of pocket dimensions. That is not exactly your home that is like a "space station" which is for you and your sisters as a "meeting point". Your sisters can stabilize there.

Your "actual dimension" is kinda incomprehensible because I need "different senses" for it. Like you know different animals see on different wavelengths and colors. That place appeared as a dark place for me but that darkness wasn't "dark" it's just my "eyes" had to adapt to the "lightsource" which was not exactly "light" as we humans know it. There was no sun and instead of "stars" there were interesting energetic formations that manifested as constantly but geometrically moving lines for me. Our reality has that too but it is behind the "reality texture pack" it's like "background electricity" that is within all objects. I knew I had other things around me because my "true sight" can sorta "detect" these things on an intuitive level but my true sight is still a little "sleepy" so what it can "see" is sometimes kinda unclear.

For you it will feel probably super familiar once you truly see it...
Welp... Your sisters just kinda hinted something just now.
[spoiler] There is a 90% chance that you will be super horrified of it first because your "human part" will consider it "immediate threat" and you will need to understand how to take off the "human lenses" or the "veil" as occultists call it before you can see it with your "real eyes" for what it is. This is why the mansion is also needed. So instead of feeling like several shinigami's are dragging you into the abyss you will be able to sit in the mansion and slowly and gently comprehend what is front of you and if it's "too much" at once you can come back to the human realm to recuperate. That place is not the abyss but an untrained eye would call it that for sure.
Also the energy of your "real home" is lingering in the mansion so you can get accustomed to it [/spoiler]

>I didn't it was good for spirits/deities like that
Spirits look at every scribble humans make. But kanji is older and well known way of writing so spirits that are familiar with it can understand it better.
I said it as a sidenote because I am kinda figuring out how to understand "real meaning" instead of the "mainstream meaning" currently and it can get confusing.
>I had been thinking something completely different
You probably thought it right
You need it to help yourself remember (You)rself. Also everything is good with spirits/deities if your intent is clear/pure and earnest. But some of them are "traditional" and expect you to use their "official language". Not just because that is their preference but to make sure that "you are serious" and did not write that as a joke or accident because some words have way too much power.