Zakenna

Zakennas (ザケンナー) 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".

Butler Zakennas
Butler Zakennas (執事ザケンナー) are servants and also butlers which come from Dusk Zone.

They aren't dangerous, but careful. They care about Hikaru, and trust him. They are always handy, and if they see an emergency they get in action. In one episode, when Hikaru was thinking about Hikari, and didn't speak to them, they kept buying for him to keep him happy.

They have a sense of humor to entertain people, as Hikaru. The short one, can clean, and always wears a blue cap. The tall one, can clean, and can make people happy.