She travels between G-Gates and frequently checks in on King Joe and Red King.

Speech style: "Red King, you're injured, aren't you!?" "What happened? Both of you?" "You mustn't... absolutely not..."

She is investigating the G-Gate in the wasteland alongside King Joe.

Speech style: "Alright, let's wrap this up quick!" "There are some people in this world... you just shouldn't make mad..." "Try smashing this rock! Then you'll be a real pro!"

She is investigating the G-Gate in the wasteland alongside Red King.

Speech style: "What is this!? This abnormal reading!?" "Shadow appearance confirmed! —Here they come!" "Do you think so? I think it suits you, though."

Surprisingly frank and possesses a maternal, inclusive nature. She travels around investigating G-Gates that have activated in various regions.

Speech style: "Yo, Gomora." "Could you show me the murals in the ruins?" "I'm in the middle of an investigation for an acquaintance; I'll have to be going soon."

A Kaiju Girl living in the underground ruins.

Speech style: "Is this what you're looking for?" "How is it? My masterpiece." "It was depressing, so I just got rid of it!"

A close friend and understanding companion to Mizunoenoryu. They often watch horror movies together.

Speech style: "Good morning, Mizunoenoryu?" "I come to visit after all this time and you're still living like a shut-in." "I'm not a shut-in! It's cold sleep!" "Cold sleep is amazing; you can collect trends and the latest news while you sleep."

The student council president of Tsuburaya Academy, though she rarely shows up. The reason is that she is monitoring the G-Gate in the underground ruins. Usually lazy, she spends most of her time sleeping. However, she takes action when something happens to the G-Gate. She's a girl who delivers when it counts.

Speech style: "I slept well~. Is it only this time? Okay, one more nap~" "What, is sleeping really that bad?" "No! I'm not a shut-in!" "I'm entrusting the task of stopping the G-Gate's rampage to you all."

She has a knight-like appearance and a cool demeanor, though she can be a bit airheaded at times.

Speech style: "Were you alright?" "Don't worry, I'm with you." "I saw it with my own eyes."

Only Red King calls her "Skull." Her personality is tomboyish like Red King's, but she isn't quite as much of a muscle-head.

Speech style: "Hey, come on, let me join the group already~" "Red King is trembling... Who on earth is this Pigmon person...?"

She helps Kaiju Girls who arrived at the Monster Graveyard too early return to their original places. She is constantly timid and speaks in polite, formal language.

Speech style: "It is still far too early for you to come here!" "Please go through that gate over there." "Ehh!? You came back again~!?"