FULL METAL SCHOOLGIRL - Accessory: "Gray Fox Tail"

"Fluffy fox-tail fur accessory, a fashion item popular in 2089.

They’re irresistibly cute—once you see someone you admire wearing one, you’ll want to try it yourself.

Some say they may even have been passed down from their mother.

*This can be changed after progressing through the game to a certain point.

Changing costumes or accessories will not affect stats."