Percy Jackson and the Olympians: Legends

Rhea was described to be the loveliest, fairest and most beautiful of all the 12 Titans, with dark curly hair that swept her shoulders, eyes as green as meadows, and a smile that was brighter than the sun. Her godlike beauty and charm were such that her brother Kronos fell hopelessly in love with her and married her despite knowing of the curse that Ouranos had placed on him.

Rhea is the sweetest and kindest of her all siblings. She is frequently very calm and able to put those who surround her at total ease. As the Titaness of Motherhood, Rhea naturally adored babies and was shown to love all of her own children dearly, even Hades. Her love for her children was what made her actually lose her temper for the first time, for witnessing Kronos brutally swallow them was too much for even her calm and gentle disposition to tolerate. Ultimately, Rhea's fierce, protective love for her children was what led her to secretly plot against Kronos, which in turn led to his eventual downfall in the hands of their six children. Rhea has still retained a strong relationship with all six of her children (including Hades). With Zeus and Poseidon having stated to frequently argue about which one of them was most loved by their mother, hinting that they still love her greatly and fight over her affection.

Rhea is the Titaness of motherhood, fertility, comfort, ease and protection. She was the sister-wife of the Titan King Kronos and mother of the six Elder Olympian gods (Hestia, Demeter, Hera, Zeus, Hades, and Poseidon.) Rhea still keeps in touch with all six of her children, and they all have a strong mutual love (even Hades). Chiron mentions her while talking about Zeus and Poseidon quarreling, as one of their usual arguments involved which one of them their mother Rhea loves more. Rhea had managed to keep out of the Second Titanomachy, which her slowly rising husband was intending to implement.