Your Wallet holds various tokens that can be earned in MapleStory 2. These tokens are stored in your Wallet:
Valor Token - Earn from the Maple Arena or PvP Quests.
Treva - Earn from Twisted Pocket Realm.
Rue - Earn from daily quests offered by the Allicari merchants.
Havi Fruit - Earn by settings new records in the Dark Descent or by using a shadow stalk from the weekly quest rewards.
The Wallet can be accessed by clicking on the "wallet" icon in the top-left of your screen.