While i SHOULD be doing homework...
Player Names are typed with the intent that you will type them on your own in japanese.
Thus for say, むぅPKPK, Instead of Muu, it's Mulu. Because L before a vowel will cause it to become smaller in text size.
Anyway, for Kureyon[marux2]chan. The Marux2 is because of the two circles in his name.
And...Murata Akiha? Anyone can clarify what it is...i'm just curious.
oops. the Master thing, if you were to type it, Masuta- in katakana. My bad :x...don't know why i put Master in english.