She has white streaking her bright red hair. Although her true age is 323 she appears to be well into or just past her middle years, on the edge to be called old.
She was born in 677 NE and grew up in a village in the Black Hills which she sometimes joked was as isolated as the legendary Seleisin. She went to the Tower in 694 NE were she remained as Novice for three years. After she was put out of the White Tower for lacking sufficient strength.
Before leaving Ebou Dar, Dimana was a prosperous seamstress, with a number of seamstresses working for her, catering to the wealthier merchants and mid-rank nobles of the city.
Her strength in the power is 46(34), a very low one, just one level below the minimum to be tested for Aes Sedai.
Dimana now resides in Caemlyn and is helping former damane be reintegrated into society. She has Marille with her when Gawyn Trakand questions Marille on what a Bloodknife is. Dimana then brings Kaisea to Gawyn for further questioning.