Persephone is a ancient Greek goddess.
It is indisputable, as Persephone was a ancient Greek goddess who was worshiped in many location and by many people.
There are many, both ancient and modern.
In the ancient Greek religion (or as we call it, Greek mythology), the goddess of agriculture, grains, plants, etc. was Demeter, mother of Persephone (goddess of springtime).
Persephone was sweet and kind.
NO!
There is no town named Persephone now, or in ancient history.
Persephone is mainly associated with Ancient Greek mythology, so it is believed that she would speak Ancient Greek. However, as a mythological figure, she is not bound by a specific language and her communication would transcend linguistic barriers.
Yes, she's the goddess of harvest and agriculture.
Persephone is the Greek goddess of innocence and queen of the underworld.
The goddess Persephone is depicted with a pomegranate in her hand because she is the Greek goddess of vegetation.
Persephone has no weaknesses - she is a Greek goddess.