Fumika is the main protagonist of the Shigofumi franchise.
Fumika is an otherworldly mail carrier who delivers Shigofumis to individuals. She was a wide range of abilities ranging from rapid healing to increased agility and she carries an Aaron's Rod named Kanaka.
Fumika Mikawa was subjected to abuse from her father, Kirameki Mikawa, from a young age and developed a split personality disorder. The other personality, known as Mika, eventually shot her father, although he was not fatally wounded. When Fumika Mikawa discovered this, she fell into a coma and Mika gained a physical body, becoming the mail carrier known as Fumika.