Mine has a bit of a mixed reason and possibly a long explanation, but I'll try to give an idea~
I've used all sorts and kinds of names before, either in English or romaji. Most of them were character or account names. One varied to the next according to what stage of my life I was in~ (after some serious events, I mean).
The majority of what I used back then were some dark names/titles according to how I felt at the time.
(ex: DarkSlayer5o, Imprisoned_Heart, eternalEclipse, BlueStar, Rain, Crystal)
Maybe 2-3 years ago, I took a sudden turn from trying to be like others, to trying to be myself. I started using things that resembled or symbolized Divinity, or purity. (ex: JunsuinoHikari, Ushio, Setsuri, Serenic_melody, atheina, Ethereal)
I'm more used to being called Ushio in some places, and I kept how the word is made in mind.
There's two kanji: 潮 and 汐
Technically, most Japanese just say Shio, which is salt water. Ushio implies more about the Ocean's waves.
The first is literally: morning tide. the second is Evening tide, which is used in Clannad (and where i got the idea :p)
Rather than being in a dark place, I wanted to be in light, so I use the first: 潮
which btw, most Japanese people think of evening tide when they hear this word, so having it as a kanji where I can is a good thing~
This part: 神摂理 I believe is derived from some other word I used in an MMORPG. I can't remember it exactly, but it was like shinseinoSetsuri, something related to divine providence and purity. (I'm not sure, I think it was for some korean game called aika.)
Anyway, I kept changing the meaning for the sense I wanted it to mean, which is how I got 神摂理 (KamiSetsuri).
After a while, I just used that as my "full name" for Japanese people who couldn't say my real name :P
