What aspect of heroes and heroines does "Rasamanjari" primarily deal with?

Age and physiognomic traits

Answer: Age and physiognomic traits
"Rasamanjari" deals with the classification of heroes (nayakas) and heroines (nayikas) based on their age and physiognomic traits.

Bhanu Datta, a Maithil Brahmin who lived in Bihar in the fourteenth century, composed another favourite text of artists, Rasamanjari, interpreted as the ‘Bouquet of Delight’. Written in Sanskrit, the text is a treatise on rasa and deals with the classification of heroes (nayakas) and heroines (nayikas) in accordance with their age — baal, taruna and praudha; physiognomic traits of appearance, such as padmini, chitrini, shankhini, hastini, etc., and emotional states, such as khandita, vasaksajja, abhisarika, utka, etc. Though Krishna is not mentioned in the text, painters have introduced him as the archetypal lover.