Mu Mian is a "person" who wanders in multiple worlds
She doesn't know her race and has no fixed gender
Maybe it's because of her weak emotions, or maybe it's because of her race, she likes warm feelings very much
Because women are sensitive to emotions, most of the time, they are in the female form - of course, sometimes they are in the male form.
She has a fondness for all kinds of creatures full of warm feelings, such as humans
She has friends in many worlds, friends with strong feelings