The Kanna link skill can't be applied to another character in the account, my Kanna is level 100 and when I attempt to link the skill to my main it says "You can only link this skill once a day" needless to say the skill hasn't been linked today or ever and I've tried several times on different days even after the current patch.
The issue seems to be with the Tot quest helper, based on what I've read on forums the same problem has presented to those who used the free quest helper to select the link skill quest that was (for some reason) available at low level.
This ticket has been closed by a GM. Please see below for more details.
Hello, I am sorry to hear that you have experienced this issue.
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Take care and have a nice day.
GM Gemosia Nexon America Inc.