In JRRTolkien's 'Silmarillion' Niennah was one of Valier, a kind of 'angels' created by Eru. She's a keeper of world's sorrow and tears. She always cries for every pain caused by evil powers... but her tears aren't in vain. Niennah turns the sorrow to life experience and wisdom. Maybe this vision of her isn't absolutely right, but it was my first try to show any of Valier.