One new servant is being added to the servant dating pool and this is that servant.

Divine spirit: Ereshkigal (budding) (flower of kur)

Personality: ereshkigal didn't change much as she grew up but she is far more naive due to her youth, this version of her was summoned by the Valentine's Day magic but yet she still cannot leave the underworld, she wants nothing more than to grow a flower in the barren soil of the underworld, without magic.
Event ability: divine construct: flower of Kur (she can summon a Semiramis-style fortress in the shape of a flower but instead of being an all-purpose fortress city it is instead a giant canon in the shape of a city that ties together with her grand magic.
Hidden abilities: divine body: goddess of death rank: B (takes reduced damage from all servants who draw their power from death)
Divine authority: beauty of Kur (she can charm male enemies with her attacks, she takes reduced damage from male opponents, her power is slightly increased when fighting near her master)
Grand magic: divine construct: flower of Kur: full bloom
Characteristics: valentines 2019, female, divine spirit, goddess, budding, Babylonian
Class: Warrior
Rank: EX
Rank explanation: ereshkigal (flower of kur) is just a slightly worse version of her original self and since her original form is one of the best warrior type servants it makes sense that this version of her falls into the EX rank as well, most servants aren't going to be able to damage her for very much thanks to her first two hidden abilities provided some defense buffs against almost every servant, she can also charm male opponents which is always nice but should never be relied on.  The power boost she gets around her master is negligible in most fights but it's still nice none the less. Her event ability is good in the same vein as how semirami's is good and her grand magic is probably better than the original ereshkigal's so this version has that over her.