Galko Otoko, known as ガル子 (Galko) in Japanese, is the main protagonist of the anime and manga series 'Oshiete! Galko-chan'. She is a high school student with a flashy gyaru (gal) appearance but is kind-hearted, straightforward, and often misunderstood due to her looks. Galko is known for her candidness and her unique way of addressing sensitive or embarrassing topics among friends. Her role in the series is central, as the story revolves around her daily life and interactions with her friends, Otako and Ojou.