I thought there was a shared store until I entered the game (iCBT1) 
So my first suggestion is that the game should have shared store to share items between characters. At a result, there will be limited items that cannot be shared.
Second, there is a mail box in barrack but how can I compose a mail? @@ Or maybe this mail box only receive mails from IMC. However, I would like to recommend a in-game mail box which we not only send mails but also attach silvers or items on them. The communication in game is great, and it would be more great and helpful if there was a mail system. Why? Because you are not going with your friends side by side all the time in game, but you can chat with them. So it is convenient in case of you want to send them offline messages or some friends need help from you or simply want to present you some items but they arenāt in the same place with you to make a trade.
Finally, I have a feedback on Friend Request System. I donāt know if it is a bug or not, but I cannot accept friend requests, or reject either. No matter how hard I clicked on O and X button, nothing happened and the requests were still there. 


Definitely think this should be addressed.