Random question that has absolutely nothing to do with RO, unless in your case it does!
How did you choose your username? Is it based on a game character of yours, an event in your life, a homage to someone or something, or just a funny word you found in the dictionary?
I can't speak for the person who first made this account, who named it akaisasori, but the name I chose for it (AlmrOfAtlas) is based on Sion Eltnam Atlasia from Melty Blood, who studies Alchemy at a place called the Atlas Academy. I friggin love Melty Blood (Tsukihime as well!), and she happens to be my main in it XD