Mikan Tachibana

Mikan Tachibana (タチバナみかん; 立花みかん (in older episodes)) is the "I" (Atashi) in the series' title and the main protagonist of both Atashin'chi and Shin Atashin'chi. She is a 17-year old second year high school student that attends the Kusai High School in class 2C and a member of the Teddy Bear Brigade. She's voiced by Fumiko Orikasa.