She is always teetering on tears, though her name means She Who Weeps – Nienna does try quite hard not to cry all the time. She is anxious and sad, but she tries to remain hopeful despite all the terrible things she sees in the world. She carries herself with a grace she does not feel for if you tap too hard on the glass she will almost immediately crumble and once she begins to cry it takes her a long time to stem her tears.
love/sexuality headcanonA persons gender does not really matter to Nienna, though it takes quite a bit to gain her romantic interest. Right off the bat everyone has her love and affection, this she gives unconditionally but it is very different than romantic love. The only word I can come up with that is similar to it is maternal, but even that is not quite right. It is not romantic, and it not always parental – but it is a love with no strings attached.
religion headcanonAs far as religion goes, Nienna feels like she is an absent goddess. It is something that she would like to change but she does not feel it is her place to make such decisions. She places her faith in Manwe and Iluvatar. She would be hard pressed to question them. The only time Nienna speaks up about anything is when she feels someone is going to be unjustly punished or she would like someone to be given a second chance – but she can recognize when her personal feelings are in the way. Essentially she has blind faith in those who are meant to lead her.