Soi Fon is a relatively petite woman with gray eyes and black hair which she wears short with two long braids bound in white cloth. She wears a traditional Shinigami captain's uniform with a sleeveless black haori. She is staunchly loyal, strict, and unbending in her beliefs. She is a hard worker and takes a strong moral stance. She will not hesitate in the slightest to strike down even her subordinates if they stand in her way. She is also obsessed with Yoruichi Shihouin.