To purchase anything from Ragnarok Online 2 "Kafra Item Shop", you would require Game Cash (RO2Cash) to purchase them.
To Top Up your @Cash and Convert your @Cash to RO2Cash, please click here to refer provided guide
Top Up Channels and Methods
@Cash is conveniently available through various gateways including authorized retailers,credit cards,kiosk and mobile. Please select your preferred payment method below for more information on the top up method.
1. From Authorized Retailers
2. Online Channels