http://www.twilightmuonline.com/zenbank.html
The ZenBank is pretty much what the name says, a website bank where you can deposit your zen from any of your characters, withdraw the zen to any of your characters and even send the zen to other players.
In the future the Web ZenBank will also be used for players to receive Zen rewards from events like gamble so you won't have to be offline in order to be able to play those events.
Working with ZenBank:
- to deposit or withdray zen you need to be logged off the game.
- to send Zen to another player you don't need to be logged off the game and neither does the receiver.
If you have any questions post them in Q&A Section of the forum.
Have Fun.