One of the recent updates had character panel removed for mobile (don’t know about pc version as I don’t use it) version when only one character is active.
While most users may find this change convenient as it frees some of very limited mobile screen area, I disagree.
On mobile when you open character or room panel, it takes all of your space and you don’t see if there are new messages. Reading a long character profile and closing it every minute to check if it’s your turn to write is inconvenient.
Furthermore, if someone sends you a direct message while you travel a few rooms without closing the panel, you can easily miss it, as the direct message gets drowned in a row of travel messages. You can swipe down every time you travel, but it’s inconvenient.
Yes, it can be solved by having more than one active character at a time, but I don’t think that it is a good solution that works well for everyone.
So I suggest making it togglable is settings menu.