Fincent

Zeta Grey is Tomoko's older brother, one of the mascots of Pretty Cure Monster Mania and one of the original Precures from Halloween Hills. Although he wasn't born in Halloween Hills, and is originally from a distant planet. He and his father crashed on Earth many years ago, and were welcomed in Halloween Hills by King Hallow until they found a way to get back home.

At the start of the story he got turned into a small, green creature which resembles a Hopkinsville Goblin. And is soon captured by Onibara. Orlok, Jacky and Larry manage to take Zeta's Hollow Changer with them but it seems broken and unfit for use. Until his sister comes into play and repairs it relatively easily, and thus inherits her brother's powers.

Personality
Zeta is mostly calm and quiet, preferring to think before acting, which often puts him at odds with the impulsive Larry. Though, he can get angry over small and seemingly unimportant things. Like his sister, Zeta is very curious, and also loves to take notes. He loves exploration and discovery and gets excited over cultures and customs from Humans and Monsters alike.

Relationships
Tomoko Hoshimoto

Dr. Roswell Grey

Orlok

Jacky

Larry

Wisp

Cure Alien
Cure Alien was Zeta's Pretty Cure alter ego, before Tomoko. He used the green Hollow Changer to transform, by kissing it and saying: "Boo Boo Bogey! Monster Change!". His main colors were Green and Silver and he was represented by stars.

Cure Alienus
Cure Alienus is the upgraded form that Tomoko attains in Episode 30. By fusing with Zeta to become Cure Alienus, which allows the maximum potential of the precure's powers to be released. In this form, the Cures can perform their strongest, combined, attack: Monster Mania

Trivia

 * Zeta, along with Orlok and Larry, are the Author's only Male Cures.