Itosu, Mana

糸洲真魚

Itosu is very polite and acts more level-headed than Ruka, whose personality is the opposite of hers.
She is also very polite in the real world, as seen during her meeting with Kuroyukihime, and she holds high regards for her master and the rules that he set for her and Ruka.
Itosu became the child of Ruka after she became a burst linker. After becoming a burst linker, she and Ruka are inspired to increase the number of burst linkers in their community.