Jade is a female Warframe with head wings that usually fold to cover her face, angel wings that fold to cover her torso, and wings around her waist that fold to make the appearance of a long skirt.
Notably, she is the only frame to be pregnant, as per her backstory which can be seen in the Jade Shadows quest.
She has a relationship with Stalker, as in-lore she and the Stalker had been made into warframes as punishment for the status of their relationship. At the end of the Jade Shadows quest, you can choose the name of her child, the options being Sirius or Orion.
