Answer:
I am a creature with a βtightβ name.
I am a sound made by felines when petted.
I can fly but I have no wings. I can cry but I have no eyes. Wherever I go darkness follows me.
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
When I point up itβs bright. When I point down itβs dark.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.