Gender: Male Age: Unknown Species: Yaya-tribe Occupation: Kaiju Hunter Weapon: Pistol His pupils are shaped like a minus sign (-). He is one of the two main protagonists of the Kaiju Encyclopedia. He is best friends or brothers with Merong White. Though he finds work bothersome, he works hard once he starts. He is the one Merong Pink admires.

Gender: Male Age: Unknown Species: Yaya-tribe Occupation: Kaiju Hunter Weapon: Intelligence His pupils are shaped like a plus sign (+). He is one of the two main protagonists of the Kaiju Encyclopedia. He is best friends or brothers with Merong Black. He is the only one who can interpret Violet's gestures. He is the one Merong Mint admires.

Gender: Female Age: Unknown Species: Yaya-tribe Occupation: Kaiju Hunter Weapon: Boxing Gloves Her pupils are shaped like a division sign (÷). She is close friends with Merong White and Black. She is taciturn and expresses her thoughts through gestures. She is incredibly strong.

Gender: Female Species: Yaya-tribe Occupation: Kaiju Hunter Her pupils are shaped like a greater-than sign (>). She admires Merong Black and is a huge fan of his. She is close with Merong Mint. Weapon: "Romantic Bazooka" Part of the Merong Cutie Duo.

Gender: Male Species: Yaya-tribe Occupation: Kaiju Hunter His pupils are shaped like a less-than sign (<). He admires Merong White and is a huge fan of his. He is close with Merong Pink. Weapon: "Romantic Bazooka!" Part of the Merong Cutie Duo.

Gender: Female (Presumed) Species: Yaya-tribe Occupation: Kaiju Hunter Her pupils are shaped like a multiplication sign (×) and she has white hair. Her personality is the polar opposite of Violet's. Her weapon is a guitar, but she doesn't use physical force; she attacks with noise, so even her teammates have to wear earplugs.