Fragments are one of four currencies in Identity V 
.
Overview
Fragments is a currency used to purchase costumes and accessories.
Obtaining
When you receive a duplicate of an item, you will receive a number of fragments instead.
Dismantling Unlock cards will provide fragments based on its value.
Fragments can also be obtained in the first three battles of the day and weekly login.
You can also get frags from events, like the Christmas event or Lunar new year.
If you go to your guild, you can buy frags from the shop.