Appearance and Abilities
She is described as being elegant despite being stocky. She has a square face and an upturned nose. She is a fierce, tenacious and determined woman, not easily daunted.
This is not confirmed by "The Wheel of Time Companion" where her level of strength is described only as 22(10). But this is probably a mistake because nine levels below the strongest Sitters would mean that Rina was a too weak Sitter compared to them.
Rina's true level of strength can be guessed by the time she spent as novice and Accepted which was in total seventeen years, roughly the same as sisters that are between levels 19(7) and 20(8), in fact the time spent in training usually reflects the strength of an Aes Sedai.
However, given the fact that Rina was part of the Too Young Sitters conspiracy, her strength level might not have been considered when she was elected, meaning that she could be weaker than the other Sitters.
Rina gave up hunting for him actively. She let him go in large part because she knew the Red sisters who had accused him of being a Darkfriend might well kill him no matter what she tried to do. None of which meant she did not want him back; he was hers by Aes Sedai rights, and they were probably married.
After the schism in the White Tower, when Joline Maza was unchaired by Elaida a'Roihan and sent to Ebou Dar, Adelorna Bastine, the head of the Green Ajah, picks Rina as new the Sitter for the Green Ajah, although she was young for the position.
Rina is present when Elaida grants the Sitters requests to begin negotiations with the Rebel Aes Sedai.