The Energy Bar showcases how many Energy Points you have left. You use an Energy Point every time you make a Choice. Non-Premium users can consecutively make 8 Choices before running out, while Premium users can make 12.
But don't fear! You'll regain one Energy Point every hour (or two every hour if you're Premium) until the Energy Bar is full again. You do not have to wait for it to fully recharge, either. As soon as you have another Energy Point, you can use it whenever you like. If you don't want to wait, you can purchase Extra Energy Tokens at the NC Mall. Non-Premium players can also watch an ad to regain one Energy Point per watch, but you can only watch 3 per day. Learn more about NC Tokens in the Kanrik Chronicles NC FAQ.