Zakennas are the demonic underlings of the Dusk Zone. They are used by the commanders of the Dusk Zone to attack Pretty Cure and wreak havoc while in the Garden of Rainbows. Their normal forms are large, shadowy faces with a large, throbbing temple. Because they have no actual physical form, they can easily shape-shift and take control of ordinary objects in the Garden of Rainbows, instantly doubling their destructive force. Zakennas are also able to take control of humans, though this is rarely seen.
The name Zakenna comes from a really bad Japanese curse "zakennayo", mostly said in form of "Uzakeru na" meaning "Don't mess around with me".