Yes.
During the spring and summer: the living.
During autumn and winter: the dead.
Not often living mortals.
Persephone was both the Queen of the Underworld (the place all mortals go when they die) and the goddess of Spring (when life wakes upon Earth: as her mother Demeter causes all plants to grow).
Persephone does not have any children.
Persephone is a goddess, so no - she does not.
Persephone's allies included her mother Demeter, who was a powerful goddess of agriculture and fertility, as well as her husband Hades, the god of the underworld. Additionally, Persephone was often associated with other deities such as Hermes, who facilitated communications between the underworld and the upper world.
No, neither Persephone nor her husband Hades have any children.
No, neither Persephone nor her husband Hades have any children.
Yes, Demeter, the Greek goddess of agriculture and fertility, had weaknesses that often led to trouble. Her deep attachment to her daughter Persephone made her vulnerable; when Hades abducted Persephone, Demeter's grief caused the earth to become barren, leading to widespread famine. Additionally, her strong emotions and determination to protect Persephone sometimes clouded her judgment, resulting in conflicts with other gods and mortals.
Many, for Persephone is daughter of Demeter and Zeus. Any child of her parents would be her sibling.
Any that Persephone so pleases as Queen of the Underworld.
Hades does not venture very often from the Underworld where he rules, he had kidnapped Persephone as his wife but was not often interested in the affairs of mortals or events upon earth.
Persephone needed no weapons, being the goddess of Spring and the Queen of the Underworld is enough to give anyone pause.