Sally is a female chick character featuring tiny black eyes, an orange beak, a body covered in yellow feathers, and small feet. She typically resides in a windmill tree hollow within a park.

Her personality is multifaceted across portrayals. Generally naive yet occasionally clever, she possesses a cunning streak arising from perceived lack of attention; this fuels her devoted attachment to Brown, whom she considers a best friend and former love interest. In *LINE TOWN*, she exhibits strong-willed and reliable traits, often taking on a nurturing "mother friend" role within her group. She enjoys karaoke, especially nostalgic songs, and dislikes flattery due to discomfort when saying something silly. A distinct shift occurs in *Brown and Friends*, where she pursues witchcraft with determination and becomes easily irritated by friends distracting her studies.

Sally's relationships are complex. Brown serves as her master; though disliking being treated as a slave, she remains loyal and follows his orders. Alternate portrayals show Brown viewing her as "the little sister he never had." Her core social group includes Cony (identified as Brown’s wife), James, Moon, Jessica, Leonard, and Edward.

Trivia notes clarify common misconceptions: despite frequent misidentification as a duckling—prompting an official clarification skit by LINE—she is definitively a chick. Though often a background presence, she garners significant fan appreciation. She is depicted as old enough to maintain employment.