Rhea is one of the daughters of Gaea, wife of her younger brother Kronos and mother of all his children. She served as Queen Of The Universe under his rule, though it's unlikely she had much personal power.
After she gave birth to Hestia, Demeter, Hera, Hades and Poseidon only to see Kronos eat them, she saved her youngest son Zeus from his wrath. Zeus defeated and possibly killed Kronos.
Immortality: Rhea does not age; she has kept her current apparent age for millions of years.
Flight: Rhea can lift her own body telekinetically. It's unknown if she can travel faster than light.
Invulnerability: By placing a mental lock on her molecular structure, Rhea can prevent her body from being harmed.
Godlike strength: Rhea is as strong as she thinks she is.
Godlike stamina: Rhea doesn’t need to eat, drink or sleep.
Universal translator: Rhea can understand any language instantly. People around her will have the same ability, but it will fade over time without prolonged contact.
- Considering Vesta often invokes the name of her grandmother Gaea but never Rhea's, it's possible that she was mostly raised by Gaea
She has not appeared in the series yet.