Gender: Male Age: Unknown Race: Yaya-jok Occupation: Kaiju Hunter Weapon: Pistol His pupils are shaped like a - (minus sign), and he is one of the two protagonists of Kaiju Encyclopedia. He is either best friends or brothers with Merong White. He finds work bothersome but works hard nonetheless. He is admired by Merong Pink.

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

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

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

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