Within the core In Nomine setting Persephone in chief among the Greek Chthonic gods, having taken over the responsibilities of her husband Hades who was lost during the Purity Crusades. As the de facto leader of a major Ethereal faction, she can be considered a Superior for most purposes.
Persephone is not happy about trading Hades’ to Asmodeus, but the Prince of The Game has, surprisingly, kept his word to the underworld goddess and had not allowed Beleth to force any of the Chthonic gods into her service. That said, many choose such patronage willingly. Hekate and the Furies are well known for working with the Princess of Nightmares, on the other hand Thanatos and Charon generally throw their lot in with the Prince of Death.
Classically Persephone is the goddess of spring and child of the harvest. She is associated with the pomegranate as it is the seeds of that fruit which bound her to spend 4 months of each year in Hades’ domain.
As a goddess of both new growth she is also associated with fertility and rebirth.
Elements
Suggested Attunements
Blood Seed
Persephone will occasionally be convinced to allow one of her servants a seed from the pomegranates of Erebus. Consuming the seed will rob the servant of 1/12th of their life, but shall also grant them the ability to see specters freely (including those using songs, possessing mortals or objects, and those using other supernatural powers).
Cost: 4 CP; Gain Need (Spend 1 hour in Erebus)/2
With GM permission, a PC may negotiate to redistribute when they give their time to Erebus. For example 2.5 days/month or 1 month/year might also be acceptable. However, until the Need is met the PC will gain no essence from the passage of time nor from any rite.
Breath of Verdure
Servants of Persephone often have an especially green thumb. This is one of her oldest and most frequently granted attunements. Those with the Breath of Verdure may cause any plant to sprout or blossom just by breathing upon it. If this is done out of season the plant will return to its normal state after 1 day.
Prerequisite: Servant must never have committed a blood sin (murder or manslaughter)
Cost: 2 CP; foreswear all murder and manslaughter
There is no specific mechanical effect created by the vow to Persephone, but willingly breaking the vow causes a permanent loss of the attunement, and violating it while under a supernatural compulsion still requires an act of atonement before it can be used again (typically some form of mythic feat).
Death Walking/Chthonic Torch
A servant of Persephone may enter the Marches through the mind of a dying human. The servant must themselves be asleep or in a meditative state before succeeding on a Precision roll. The servant must have seen the dying individual in life, but the two may be anywhere in the world. The servant gains a +2 bonus to the TN if they are physically touching the subject. In order to succeed the subject must be unconscious and on their way to either Hades (the gate to Hell) or Erebus. The Check digit indicates the number of minutes the servant may stay in the subject’s dreams (if successful) or how long must be waited before trying again (if not).
Cost: 4 CP; Half the Servant’s Warmth
(Servant must gain either Vulnerable [Cold]/3 or Cold Blooded/2)
Stygian Compact
Not all servants of Persephone began that way. Those with a Stygian Compact sunder their ties with another Superior in order to gain the ability to perfectly mimic death. Only the Barons of Saminga or the resonance of a Seraph can pierce the disguise.
Cost: Surrender an Attunement from another Superior.
Fighting Persephone
As a Superior, Persephone should probably be well beyond the ability of any PC to defeat in any long term and meaningful way. However, if you want to make a principle goddess capable of being overcome, I would suggest putting her at about 16 Forces.
Also, should she be defeated entirely, some other aspect of her will undergo apotheosis so long as she still has worshipers anywhere in the world.
If your intent is to make her a big bad, you can always treat her like any other Superior and have most of the week-to-week conflicts involve one of her subordinates (such as Moros the God of Doom or Hekate Goddess of Witchcraft and Poison).