McKenna, or 美丽的火 (English: Beautiful fire) is a member of the Electroclan. Along with Ian and Abigail, she was held captive by the Elgen for many years because she refused to follow Hatch. She join the Electroclan after escaping from the Elgen Academy's prison known as Purgatory.
After Ostin explains the history behind the Apache Airlines logo and symbol on the hangar and their connection to Douglas, Arizona, Tessa pessimistically connects the story to the potential end of the resistance. McKenna states Tessa is supposed to enhance their powers, not diminish them.
As everyone is exiting the plan, Tessa threatens to punch Ostin, and McKenna defends him. Ostin snaps at her, saying he didn't ask for her help.