If anyone just looked at this monster from outside, it looked perfectly normal. Even lightly investigating it did not reveal any secrets. But if someone thoroughly investigated this monster then they would notice that there was a small little worm-like creature inside its brain. This worm had completely blended in with the presence of the scorpion monsters and it was impossible to recognise those two presences separately.
Chris, Patrik and Kasumi all were some of the most experienced people of this world but even they had no idea what this worm was. It looked like this worm was the reason why this monster was able to think with intelligence but that was something absurd.