Listen, this ENTIRE tutorial set I've been professional I'm taking this one.
In order to buy items from the shop, PD's system works though MEMBERS inventories, NOT Characters. ALL of your CHARACTERS Crater Coins go to YOUR inventory.
Any item you purchase can be EQUIPED to any of YOUR characters.
These items can also be SOLD back to the store for half the price. These items can also be TRADED to other MEMBERS. (However you need to ask mods to do this for you)
This is the MEMBER inventory It shows that I have 800 CC
Click on the item you want to buy (Please note not all items have art, this does NOT hinder game play.)
Click BUY
Enter in the Quantity and hit Yes Buy it.
Return to your MEMBER Inventory As you can see it's now there.
For your CHARACTER to have the item all you need to do is EQUIP it
Make sure you're on the right CHARACTER page.
In the Item search type the item name
Click Equip Bottle of Water