Not sure if you can help but I mistakenly chose my 1395.83 main for the super express. Can this be reversed at all? Stupid mistake. Forgive me plz. 
Server NA West: Valtan
Character Name: Smallming
I wish I can have a second chance！ 
Hello @Smallming, sorry for the late answer and I hope you’re doing well.
I’m sorry that your super express was selected on the wrong character, during Thursday maintenance a few weeks back a “Character change” feature which allows you to change the character designated for the event one time, you need to find more information about it here.
Hope this information helps, wish you a good day in Arkesia.