Given the assumption that it will work out roughly like One*2, it really needs to have an option to "hide it" on certain chars.

To explain that a bit:
I used OneBag/etc on 4 chars, all fine, especially when checking the other toons. But on my Druid I had Baggins for various reasons (mostly sets) but ideally it would have been possible to have OneStorage/etc running there that I can view the inventories/banks of the other toons and vice versa but NOT displaying anything on the Druid. Just on clicking the minimap button. And of course also updating the druid's stuff to be available to the others.