As Jerle says, the current plan is that there will be a wipe at release - though it is still quite far away, so it’s not something we have discussed a great deal thus far.
I don’t think it’d be appropriate for people to have a dozen level 100 characters on day one. If there was a lot of requests for, say, existing characters to be retained but reset to level one so that chat commands would show their original (pre-release) creation dates and playtime… we would consider it. I think that would mostly be decided by how much work it would be.
It’s natural for people to grow attached to their characters, so I imagine there’ll be some feedback on the subject as the game approaches release - and we’ll discuss the feedback we get and see where it goes from there. Can’t say much beyond that at this early stage.