Arika Yumemiya

Arika is the protagonist of the series My-Otome. She is first introduced in the first episode where she travels through the desert to Windbloom to find out more information about her mother, whom she was told was an Otome. After seeing the power of the 3rd Column, Shizuru, she decides to follow her mother and become an Otome. She is sometimes nicknamed Anty (Arinko-chan in Japanese) because her name, Arika, could be "蟻か" in Japanese, which means ant. The way her head turns into an ant's head is a way to show how she feels when someone calls her this nickname (which must have followed her all her life). She is cheerful and optimistic, but lacks the sophistication and "common sense" to deal with the royalty (due to her being a country bumpkin). She quickly gets acquainted with the other Corals and Pearls in Garderobe and becomes good friends with most of them, mainly Nina Wáng and Erstin Ho, her roommates.

(Source: Wikipedia)