Poron, a young witch introduced later in the "Mahōtsukai Sally" series, joins Sally in the human world, posing as her adoptive younger sister despite lacking a biological connection, though their physical resemblance is notable. Her background implies she may be an abandoned human child from Earth adopted into Astoria's magical royal family, suggesting she will eventually need to remain permanently on Earth, separating from the magical realm.

Characterized as saucy, selfish, yet lovable, Poron possesses unstable magical abilities. These powers frequently backfire during emotional distress, such as tantrums, leading to unintended consequences like shrinking herself without the ability to reverse the spell. Her addition transforms Sally and Kabu's duo into a trio, significantly enhancing their group dynamic and introducing new layers to their adventures and comedic situations.

A recurring trait involves Poron developing a precocious crush on Yamada-sensei, Sally's teacher. This infatuation creates narrative complications due to the teacher's marital status and impending fatherhood.