Kurumi Lala Milk (クルミ・ラーラ・ミルク)
She is the number one Hime-sama which translates to princess/lady.
A tiara on her head will magically appear every time.
Her twitter pictures are usually filled with her Heyagi or roomwear.
Her profile page with English translations available: http://afiliasagaafiririru.blogspot.com/p/kurumi-lala-milk.html
P.S. her japanese name is actually amusing.
Follow her @kurumi_963