Sally is a yellow-feathered chick with tiny black eyes, an orange beak, and small feet. Her design occasionally leads to misidentification as a duckling, though official content clarifies her identity as a chick. Within the LINE Friends universe, she holds major member status. Her personality blends naivety with flashes of cleverness and cunning, particularly when seeking attention from friends. This behavior stems from her perception of being overlooked, driving her to attach herself closely to Brown.

Brown forms the core of her relationships, with Sally portrayed as his tag-along buddy. He views her in a sibling-like role, while historically Sally harbored romantic interest toward him. Their bond centers on companionship.

In the Netflix series *Brown and Friends*, Sally pursues witchcraft with dedication. She becomes easily irritated or angered when friends interrupt her studies, intentional or not.

Introduced after the initial four LINE Friends characters—Brown, Cony, Moon, and James—Sally joined the expanding roster over time. She frequently appears alongside Brown and Cony as a prominently featured character, moving beyond a background presence.