Feather is all about self discovery, and being the light in the darkness. Ze go by Ze/Zir/They/Them/She/Her... They're a comfort baby.
If you don't know what your identity is as a person, Feather comes as a slimy bioluminescent cutie, with a heart of gold and mission in mind to help you find your identity, and go through the depression, anxiety, and ups and downs that come with it, with you.
When their job is done and you know who your identity is, Feather gives a cooing farewell and disappears.
If you need to stim, since Feather is made of slime, she can literally be squished and reform perfectly fine. If it helps to calm you down, squish! Also the slime she sheds are perfect for stimming or fidgeting with. And since Feather is bioluminescent, They are literally the perfect nightlights for those afraid of the dark.