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.
Ability to create light and heat from any part of her body. She can heat herself to more than 3,000 Kelvin, which is more than 4,490 degrees Fahrenheit (2,726 Celsius). They discovered this while she was testing with the Elgen before she was sent to Purgatory.
McKenna's first appearance was discovered after Nichelle had tortured Taylor, and when she was sent to Purgatory along with three other Glows, she met McKenna there. In there, she learned about her powers to generate surprising amounts of heat.
Later on, when Michael is sent to Cell 25 and is tortured by Tara, McKenna, Ian, and Abigail all help out to save MIchael from the pain. McKenna is involved in this as she is the one who radiated the toilet pipe so that it glowed, and Abigail used her powers to ease Michael's agony.
When the Electroclan is attempting to escape the Starxource plant, they find out that Jack Vranes had stepped on one of the landmines. Nichelle makes a comment about not leaving family behind, and Ostin suggests that the landmine could be disabled through a certain amount of heat. McKenna helps, kneeling where Jack's foot is, and after being scorched, Ian notes that the wires look "wilted."
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.