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When there is something you do not understand while playing the game, check the Help messages.
You can do this by tapping ? in the top right corner of each event menu, Edit Team screen, or Inherit Skill screen.
Example: The icon highlighted with a red box in the upper right-hand corner of the Inherit Skill screen.
You can also refer to the Learn With Sharena page by tapping the banner below when you see it onscreen.
If the above does not resolve your issue, please contact Customer Support via the Inquiries form at the bottom of the page with a detailed explanation of what you are having trouble with.
If your inquiry is about battles, please include the relevant Heroes' name(s), skill name(s), and the map you played on.