Where did your username come from?

Just like the title says, give an explanation on your username.

I have three main usernames, I will explain all three ^_^

My Main one is "Xero" which I actually got from Linkin Park, it was the bands original name. (it used to be "Shiari Xero", but I dropped the Shiari part awhile ago) here is a piece of info on this courtesy of Wikipedia:

Wikipedia wrote:

Originally consisting of three high school friends, Linkin Park’s foundation was anchored by Mike Shinoda, Brad Delson, and Rob Bourdon.[1] After graduating from high school, the California natives began to take their musical interests more seriously, recruiting Joe Hahn, Dave Farrell, and Mark Wakefield to perform in their band, Xero. Though limited in resources, the band began recording and producing songs within Shinoda’s make-shift bedroom studio in 1996.[1][15] Tensions and frustration within the band grew after they failed to land a record deal.[1] The lack of success and stalemate in progress prompted Wakefield, at that time the band's vocalist, to leave the band in search for other projects.[1][15] Farrell also left to tour with Tasty Snax and other bands.[16][17]

(I highlighted "Xero" lol)

my Second username, which you all know me by, is "Kusero". The way I got Kusero, is I entered "Xero" into a Japanese Phonetic Name Translator, and got "Kusero" and I liked it so I used it.

My third username is "Kesenai Tsumi" (which in english, by what I have heard, means "Unerasable Sin") is actually the name of the first ending of Full Metal Alchemist. I liked the name, so I started using it.

Thats pretty much it, lol

My girlfriend inspired my username

We live a long distance apart, and at times im worried our relationship wont work out,
but she always tells me to have faith, and have hope. So for her (well for US), Im "Holding onto Hope" that our love will work out....

and she's coming to see me in May so, happy days

Also, its a pretty name, I wanted somthing, meaningful.

Um...my username came from the fact I'm obsessed with mythology, and I love nature, so they just kinda stuck...

Let's see. Sio came from my story, and Zephyrus from Roman mythology and my Latin class.

Okays, now I'm not so much as obessed with mythology as before...
Hm, I don't know. nature-elf is a good username. Odd though...Elfie was made by Lighty when she said I should have a nickname 'cause it was too long. I made her use "ie" instead of "y"...

My username came from a stuffed cow from Twister in Universal Studios in Orlando, FL. Cowie's REALLY cute. Anyways, cow seemed too lame, and I first used it on Runescape. sweetie part of my username only came by because everyone else had taken all of mine. It was on the suggestionon Neopets too. So put them together, it's sweetiecow. And I always use this one, so if you see sweetiecow, it's probably me. It's not very common, y'know?