Yendë is quite closed about her background. To non-Noldor she will only admit that she is a Noldo, and a soldier.
Generally, she seems to be proud and cold and warlike in demeanor. Only to other Noldor, and even then mostly to other warriors, she may drop her polite but distant attitude. But sometimes, she will show a glimpse of the person beyond the warrior - in the singing of a song, a hopeful word, or a rare smile.
She speaks Quenya as her native tongue.
Her brothers in arms
Bantering by the fire, swimming and bathing
Yrch and any servants of the enemy
The glory of the Noldor
"Who I tell or do not tell my name to is my own business. But you may call me Yendë."