Riko, Reg, Nanachi and Faputa

Riko is a girl of approximately 10-13 years old, she is quite small, she has long blonde hair, blue eyes, she wears glasses, she has a thin build, after all she is a simple underage girl, she wears a miner or climber's suit with a lamp on her cap, she carries a White Whistle, with this instrument she has the ability to improve Reg's skills. She is the cook of the group thanks to the fact that she has more knowledge than everyone in the group about this field, she is a curious girl and is in the Abyss for one reason only, she is looking for her mother who told her that she would be waiting for her at the bottom of the Abyss itself. She is a quite friendly and curious girl, although she is also careful and loves to explore the depths

Reg is one of the biggest mysteries of this anime, because he has the appearance of a small child and similar to Riko, however he is a machine, his arms and legs that work as hooks, because they can be launched away from Reg's body by means of a fairly thick and resistant wire, in the palms of Reg's arms he has a laser cannon which disintegrates absolutely everything that comes into this range of the explosion. Reg has brown skin with yellow eyes, short brown hair, a metal necklace which is attached to a red cape. Reg is the guardian of the group, he is a machine and is usually in charge of caring for and standing guard every night, sleeping but using his outstretched arms as touch sensors. Reg is quite strong, fast and resistant, when Riko uses the white whistle he becomes much stronger and faster, his abilities are enhanced in all aspects but in some cases he is fearful and tends to overthink everything, he is very careful and likes to prevent things, however he is also friendly with his companions and friends

Nanachi is a kind of rabbit with light brown fur, his eyes are golden and he has long ears of the same light color, he has more developed senses not to mention that he is quite fast and intelligent, his role in the group would be the doctor, he is the one in charge of treating the wounds of the entire group in case they get hurt. His personality is carefree and indifferent, in dangerous situations he acts the same way although deep down he is terrified. He is quite sarcastic and rude but kind.

Faputa has the appearance of a little girl, like the rest of the group, her skin is brown with yellow eyes, three arms with white fur on her head that give her the appearance of hair, she has three kinds of rubies on the top of her head each one shaped like a rhombus, at the tip of these arms on her head she also has these same rubies that by the way are affiliated, her arms are similar, just as hairy and with three small fingers in the shape of equally sharp red rubies, she has a lot of white fur next to a huge pair of ears not to mention that she is the strongest, fastest and toughest of the entire group, when she gets angry she can cause chaos and could probably beat Reg in a confrontation.

Description:
It is the border between the Abyss and the city of Orth. There are not many relics or important beings in it, although predators from the other layers often come to look for food. The vegetation is the same as that of the island and there are not many geographical differences between points. All whistles can safely explore this area.

Description:
This is the layer where the environment becomes a dangerous zone. Animals become more aggressive and territorial, although it maintains the same relief as the previous layer. At approximately 2000 meters, the forest turns upside down and becomes what they call "the inverted forest." In this layer, the environment becomes cold and unstable and aerial predators appear. Only experienced diggers can come to this layer. In this area, the Observation Camp was created for those diggers who need a break.
Red whistlers are not allowed to enter this layer. If a red whistler manages to get to the second layer, it is considered suicide and the search parties are stopped.

Description:
The third layer is a long, vertical, tubular descent, which makes it an extremely difficult area to explore. Within its walls, a system of interlocking caves serves as a habitat for many species and a path for those diggers who dare to descend the layer. Air currents are very strong here, which facilitates aerial life forms, such as the Scarlet Jaws.

Description:
The fourth layer is a strange, humid jungle with large vines that intertwine to form gigantic concave disks that capture water from the air, a feature that gives it its name, the "Giants' Chalice." At 9,000 meters is the famous Garden of the Flowers of Endurance, an area filled with Eternal Fortunes, the signature flower of the Abyss. A truly beautiful sight, although the danger from the beasts that inhabit here is high.

Description:
The thinnest layer of the Abyss vertically, at only 1000 meters deep, but the widest horizontally, probably around 10 times wider than the city of Orth. It consists mostly of a vast, monster-filled sea with some crystallized sections, held in place by a thick layer of dense mud. This is the last layer of the Abyss where it is possible to endure the curse and return alive. An ancient ritual site, protected by the Idofront, that was turned into a laboratory for Bondrewd and his crews acts as a gateway to the sixth layer, the point of no return.

Description:
This is the layer from which it is no longer possible to return as a human. If one tries to ascend into this layer, they will be deformed beyond recognition in a process of inconceivable pain, becoming a messy pile of flesh with only basic instincts and destined to be killed by their team or to live abandoned in the abyss until their demise. In addition to the loss of humanity, in some cases, the ascender may even succumb to death directly from the curse, which, from the aforementioned, seems to be the most merciful outcome. Hence the name, "The Capital of No Return." In Orth, there is a rumor of a Golden City at the bottom of the abyss, which originated in the Sixth Layer, where the ruins of a majestic city slumber undisturbed. It is not uncommon to encounter creatures of an unreasonable level of danger here. In one isolated area, an entire village inhabited by Narehate called Ilblu was formed.