Spoiler
Blue = Joe Ginbuken > http://blog.watanabepro.co.jp/yamadayuki/
Green = Don Dockoyai > http://ameblo.jp/nb-shimizukazuki/
Yellow = Luka Milfy > http://ameblo.jp/ichimichi-mao/ (Still not confirmed in her blog yet)
Pink = I'm the Famille > http://www.foursp.jp/yui/blog/