Caesar King

Her combination of formidable strength and bold, straightforward personality has earned her the love and respect of the Outer Ring's residents. Although she appears to do things in her own way, she is actually very willing to listen to others' opinions. Caesar actively listens to and implements any valid suggestion she hears — regardless of who it comes from. She is completely defenseless against those she trusts. Once she accepts someone, she considers them part of her inner circle, treating them with absolute trust. Such individuals include Lucy, her head advisor. Piper, the driver of the big rig truck. Burnice, the bartender and arsonist of the group. Lighter, Caesar's personal champion/bodyguard (Even though Caesar is far stronger than him), and more.

Caesar's father has been missing for as long as she can remember, and her mother passed away from illness when she was young. She was raised by Big Daddy, who took a very hands-off approach to raising her, allowing her to grow up freely and independently. In addition, Caesar seems to have a curious interest in matters related to romance. If you wish to get closer to her, you might want to try discussing this topic with her.

The Sons of Calydon live out in the wild, desert lands of the Old Oil Fields, where oil and gasoline matter more than life. Running oil and gas around the desert and to other local areas is what helps drum up money for the gang. This also leads to Caesar, and her crew having to fight other biker gangs.

Caesar's father was the leader of a biker gang called "Calydon," which carved out a legendary reputation in the Outer Ring. The "Sons of Calydon" take their name from this legacy. Caesar has a fear of needles. "They're so tiny and thin, and it only stings for a second when you're pricked — but then all this blood comes out. It's so weird — and definitely not straightforward at all!"

With Pompey's corruption and subsequent death, Caesar ends up in the position of acting Overlord. She admits to being bitter about this, as even with the Sons of Calydon being sabotaged, that doesn't change that Pompey reached Cinder Lake and placed his Sparkstone in first, clearly upset that they didn't get the chance to compete fairly and for her to truly earn the role. Caesar regrets having to kill Pompey after he loses himself and becomes a monster. She's hunting to find the man who betrayed Pompey, and almost destroyed the Outer Ring. That man being Lucius.

Hollows are an apocalyptic-level disaster, an abnormal spherical dimension that appears out of thin air swallowing everything they touch. The internal space-time environment becomes disorderly due to unknown influences, and dangerous mutant creatures known as the "Ethereal" are produced. Ordinary people lost in the Hollows face not only the horror of being attacked by monsters, but have to risk the corruption and eventual mutation. Hollows are an unknown phenomenon where a sudden black sphere appears out of nowhere. These Hollows swallow everything unfortunate enough to be in their path. While Hollows can appear spontaneously, they usually give a sign before appearing, such as vibrations in the surrounding area, electrical malfunctions, and certain objects disappearing from their initial place and reappearing in a completely different location.

Once swallowed, both non-living and living beings inside the Hollow will be subject to Corruption. Non-living objects will form Ether crystals. The deeper the part of the Hollow, the higher the concentration of Etheric energy in that place, which can accelerate the corruption and increases Pressure.

For humans, the time before corruption takes a toll on their body depends on their Ether Aptitude and equipment. Some people have high Ether aptitude, allowing them to explore Hollows for extended periods without suffering the effects of Corruption. Those with low aptitude can still explore Hollows by wearing Anti-Ether Corruption equipment, which is commonly used by PUBSEC officers, Jaegers soldiers, and thugs. If a human is corrupted, they will turn into an Ethereal.

Intelligent machines can also be corrupted if they have passed the Forbidden Fruit test.

Once inside the Hollow, everything appears normal, with the same weather as outside the Hollow. However, everything inside is shifted by the Hollow's fissures, turning it into a maze with layers of distorted places. What seems like a dead end can be a way out of the Hollow or an entrance to a deeper part. The deeper the Hollow, the higher the concentration of Etheric energy, which accelerates Ether corruption and attracts swarms of monsters.

Hollows also seem to be interconnected with each other, as passing through a Fissure may lead to an entirely different Hollow, included Hollow Zero.

Hollows are naturally complex places to explore, and being careless can lead to death for inexperienced and experienced explorers alike. To safely explore Hollows, many explorers bring Bangboo with them. These Bangboo are equipped with the Carrot program, which guides explorers along safer paths, minimizing the chance of falling into the deeper parts of the Hollow.

Hollows are a natural source of Etheric energy, which has been successfully harnessed by the people of the new era as a new energy source. This method involves placing a pipe network underneath the Hollow. The pipes absorb Etheric energy produced by the Hollow, which is then converted into usable energy. After the Etheric energy is converted, the leftover Ether corruption is released into the air through "Shiyu". This method is very efficient for obtaining Ether energy while also preventing the Hollow from expanding further.

Hollows are sustained by the Ether energy inside them, and for many Hollows the amount of Ether energy is sustained by the Ethereals within them. It is possible to reduce the size of a Hollow by destroying a massive number of Ethereals, or eliminating a particularly large one. Killing enough Ethereals can even allow a Hollow to be completely eliminated, and once suppressed a Hollow will gradually shrink until it disappears.

"I'm Caesar herself, the leader of the Sons of Calydon." “Halt! Not one step further!" "I won't budge, even one step!" "There's more to battle... than just glory!" “Only the brave will win… Hehe! That’s me!”