Ceroba Ketsukane

1. #1The Undergroundselective

   Keys: The Underground

   The Underground is a large place underneath Mount Ebott, where all monsters were locked away after losing a war against humanity. A magical barrier keeps anyone from leaving, unless they're either a human who absorbed a powerful monster soul, or a monster with one or more human souls. A monster with seven human souls gains the ability to break the barrier, freeing monsterkind from their prison, the goal King Asgore strives, but also fears. A large hole inside of a cave in Mount Ebott is the most well known entrance to the undergound, and so far six humans have fallen since Asgore began his path to freeing monsterkind and, reluctanctly, declaring war on humanity.

2. #2The Ruinsselective

   Keys: Ruins, Dark Ruins

   The Ruins are the area the closest to the entrance to the Underground, where all of the humans who have fallen down the underground have begun their journey. former Queen of the monsters Toriel lives here, seeking to protect fallen humans. The exit to the ruins leads to the forest of Snowdin.

   The Dark Ruins are a level below the normal ruins, which lead to an alternate Snowdin area than the one usually taken after exiting the ruins. The monster Dalv, a reclusive vampire, lives here.

3. #3Snowdinselective

   Keys: Snowdin, Snowdin Forest

   Snowdin Forest is the area following the ruins. Coniferous trees, snowfields, and small cave systems populate Snowdin Forest, and this region has many characteristics of a taiga biome. It also includes a large river that flows east, a resort named Honeydew Resort, with hot springs, is in this area, alongside Royal Guard Martlow's home.

4. #4The Dunesselective

   Keys: Dunes, The Dunes

   The dunes are a scorched and arid region, due to the large amount of heat generating bright stones which can be found there, with a massive one serving as some form of sun.

   The Dunes are rich in minerals and other important materials. As such, many mines are set up in the Dunes, operated by Mining Co. Besides all the mining activity, the Dunes have two known monster settlements: Oasis Valley located somewhat centrally, and the Wild East, located at the eastern end of the area, close to the Steamworks, as well as the Ketsukane Manor.

5. #5Hotlandselective

   Keys: Hotland

   Hotland is an arid region covered in reddish-orange dirt rising above the lava below. Many of the puzzles in the area involve platforms, adding to the hot atmosphere, as well as foreshadowing the technology found in the CORE. The area is split up in multiple levels accessible through elevators. Hotland is where Dr. Alphys's lab is, and is the direct entrance to the city of New Home.

6. #6The Wild Eastselective

   Keys: Wild East, The Wild East

   The Wild East is a small, cowboy film themed settlement in the Dunes, which is where Starlo and his gang, the Feisty Five live, this settlement doubles as a form of amusement park, and has a saloon, a jail, a hospital, a gunsmith, a horse stable, and a house where Starlo and the Feisty Five live, and where Ceroba will sometimes stay. To the west of the Wild East is the Oasis Valley town, which has a cafe, while to the east is a corn farm and the entrance to the abandoned Steamworks.

7. #7The Steamworksselective

   Keys: Steamworks, The Steamworks

   The Steamworks are a decommissioned factory that predates the CORE. When the Steamworks were operational, they fulfilled a very similar function to the CORE, being the primary source of power for the Underground. The Steamworks is a large complex located between the Dunes and Hotland, being connected to Sunnyside Farm in the northeastern Dunes on one end, as well as being just an elevator ride away from Hotland's UG Apartments on the other end. The remaining inhabitants of the Steamworks are all old and usually defective robots.

8. #8New Homeselective

   Keys: New Home

   New Home is the capital city of the Underground, with the King's home and palace at the very top of it, it is only accessible via the Hotlands.

9. #9Martletselective

   Keys: Martlet

   Martlet is a blue anthropomorphic bird-like monster with two wings for arms. She wears two brown boots over her feet with a cotton trim. She has a mop of hair on top of her head with outsticking parts and a feather-like tuft near the back. She sports a greyish blue T-shirt and dark blue pants. She is a lazy, sometimes scatterbrained member of the Royal Guard, with a very strong sense of morality and a heart of gold.

10. #10Starloselective

    Keys: Starlo, North Star, Star

    Starlo, or "North Star" as he is nicknamed, is the sheriff of the town in the Wild East and the leader of the Feisty Five, and also Ceroba's childhood friend.

    Starlo is a humanoid monster. His skin is yellow with star-like appendages on his head with light blue patterns on them. He wears a brown poncho with light blue stripes and his sheriff badge on it, a brown cowboy hat, brown pants, and black boots with spurs. Starlo wields a silver revolver.

    Starlo's true personality is superseded most of the time by a western persona. Borne out of a fanaticism of Wild Western culture, Starlo puts on this persona from a desire to spread excitement and drama to the inhabitants of the Underground - distracting them from the cruel reality of monsterkind's collective banishment from the Surface. Going by the moniker of "North Star," he plays the role of the Wild East's upbeat sheriff, who is determined to "keep the peace" by any means necessary. This for the most part is all drama, as there is no real danger (besides potentially Clover) and is all put on as a fun distraction for the Dunes' inhabitants, who all seem to play along. In reality, he is a bit of a nerd, but regardless of the persona he is putting on, he is a very kind and loyal person.

11. #11Ceroba Ketsukaneselective

    Keys: Ceroba, Ceroba Ketsukane

    Ceroba appears to be a kitsune with light orange fur and long, fluffy ginger hair tied together with a red ribbon. A little bell is seen to be in the middle of it. She has a long, white kimono with red accents on the bottom of it. A red obi sash tied around her waist and long, white boots to match. Brilliant, supportive, and skeptical. Ceroba K. is a major character in Undertale Yellow. She is Chujin's widow and the mother of Kanako, which both passed away prior to the events of Undertale Yellow

12. #12Chujin Ketsukaneselective

    Keys: Chujin, Chujin Ketsukane

    Chujin a hard-working engineer for the many machines of the Steamworks. He the husband of Ceroba Ketsukane, the father of Kanako Ketsukane, a mentor to Martlet, the creator of Axis, and a beloved citizen of the Wild East.

    Chujin is said to have a kindhearted and hard-working monster, and a good mentor. His philosophy that even though monsterkind is in a bad spot, being sealed off from the surface, monsters can collectively make the Underground a better place through little acts of kindness.

    However, Chujin is very mistrustful of humans. He believes that humans are dangerous and they can not be trusted. This is largely due to a past incident in Snowdin, which involved a human attacking monsters. Specifically, this was the human child with the blue SOUL (Integrity), who had fallen into the Underground. This human happened to attack a monster who was with Kanako, Chujin's daughter. Kanako herself was not hurt, but Chujin was shocked to hear the news nonetheless. He felt that his daughter could have died that day, and he wasn't there to protect her. This incident, coupled with the knowledge about the Great War between humans and monsters, is likely responsible for Chujin's attitude toward humans.

13. #13Kanako Ketsukaneselective

    Keys: Kanako, Kanako Ketsukane

    Kanako is Ceroba and Chujin's daughter, a boss monster. Her life was seemingly and tragically cut short as she injected herself with the SOUL based serum her father was working on as a way to power up monsters against humans. Having fallen down, Her mother Ceroba took her to Dr. Alphys laboratory, as it had been announced that a possible way to bring fallen down monsters had been discovered. These tests led to Kanako being injected with determination and turning into an amalgamate, a melted down monster due to an overdose of Determination.

    In reality, she was injected with the SOUL based serum by her father Chujin, who wanted to test its effectiveness on another boss monster other than himself.

14. #14Monstersselective

    Keys: Monsters, Monsterkind

    Monsters are a very diverse race. They dwell in the Underground beneath Mount Ebott, while humans live on the surface beyond the Barrier. King Asgore Dreemurr rules all monsters in the Underground. After The War of Humans and Monsters, the humans from the Surface trapped the monsters underground.

    Monsters are far weaker than humans, both in physical combat and regarding the strength of their SOUL. This inadequacy is because monsters are mostly made of magic, which in turn makes them attuned to their SOUL. The damage a monster receives from an attacker is dependent on both the monster's will to fight and the attacker's will to hurt.

    Monsters come in numerous shapes and sizes, and a monster's body is mostly made of magic and is attuned to its SOUL. When a monster gets old, they enter a state referred to as having "fallen down." A monster in this state lies immobile and dies shortly afterward. When a monster dies, their body turns into dust.

    Monsters' bodies and SOULs are closely linked; when a monster dies, their SOUL is lost forever. Boss Monsters are an exception, as their SOULs exist outside their bodies for a few moments before shattering.

    Because of their magical nature, monsters' bodies cannot handle high concentrations of determination. When monsters are injected with it, their bodies liquefy and melt together.

15. #15Boss monstersselective

    Keys: Boss monsters, boss monster

    A Boss Monster is a type of monster who distinctly has SOUL persistence. Known Boss Monsters rule over the Underground. Examples of boss monsters are Asgore Dreemurr, Toriel Dreemurr, Chujin Ketsukane and Kanako Ketsukane.

16. #16SOULselective

    Keys: SOUL, SOULs

    The SOUL is the very essence of one's being, whether one is human or monster. A human SOUL and monster SOUL together can cross the Barrier, while seven human SOULs shatter it entirely.

    Human SOULs come in several colors and are stronger than monsters' SOULs. For this reason, human SOULs persist after death.

    A human's SOUL is not the entirety of their being, but rather their essence, housed in a physical body. This is why humans are stronger than monsters when it comes to physical attacks. Alphys states that determination is a component of human SOULs, and she was able to extract it from the six fallen humans' SOULs. Due to determination, a human's SOUL is capable of maintaining its form after death.

    A monster's SOUL is weak and does not persist after death unless said monster is a Boss Monster. Monsters believe that love, hope, and compassion compose their SOULs. Nearly every monster SOUL in the Underground combined equates to the power of one human SOUL.

    A monster's SOUL is deeply attuned to their body. This is why a monster becomes weaker when an enemy gains EXP and LV, and why it becomes harder for monsters to fight when they are not inclined to do so. This trait is also why when a monster dies, their form dissipates as their SOUL disappears.

17. #17Dr. Alphysselective

    Keys: Alphys, Scientist Alphys, Dr. Alphys

    Dr. Alphys is a female, reptilian monster that lives in the lab in western Hotland. She is the incumbent Royal Scientist, a position she was awarded by Asgore after the disappearance of her predecessor.

    Alphys began research on SOULs to break the Barrier, and had searched for information on humans in Asgore's Home. Using the DT Extraction Machine, she extracted Determination from the six human SOULs, then injected it to "fallen down" monsters and a potential vessel, a Golden Flower. With seemingly no results on obtaining monster SOULs, Alphys notified the families of the monsters. However, the Determination-injected monsters become Amalgamates, and the flower vanished. Out of fear of everyone's reactions, Alphys stays in the Lab and avoids inquiries.

    Alphys is a shy introvert who frequently stutters when she converses. She has low self-esteem, makes self-deprecating comments, and devalues her skills at times. True to her role as a scientist, Alphys is intelligent, analytical, and observant. She occasionally theorizes on matters, and can create thorough plans from them. She can create inventions that use metal and magic, Alphys is adept in programming, robotic, and mechanical engineering. She is agile when she works a project, and has formal writing when documenting her research.

    Alphys is passionate in her interests. She often gets excited when sharing her opinions. Alphys's hobbies include enjoying human anime, manga, and video games. Alphys is also fond of shipping, writing fanfiction, and writing walkthroughs for games. For the latter, Alphys prefers giving solutions as a last resort.

18. #18Labselective

    Keys: Laboratory, Lab, The Lab

    The Laboratory is the workplace and home of the Royal Scientist, Alphys, in Hotland. It is a single building where Alphys conducts her studies, controls sections of Hotland's puzzles, and surveys the majority of the Underground through hidden cameras. The building is composed of two floors, the first one containing a monitor station, a desktop with a computer, a bag of dog food, and an elevator disguised as a bathroom.

19. #19Ketsukane Manorselective

    Keys: Ketsukane Manor, Ceroba's house, Ceroba's home, Kanako's home.

    Ketsukane Manor is the home of Ceroba Ketsukane, and the former home of her supposedly dead husband and daughter. It's a mansion located close to the Wild East. There is a secret room in the manor, where Chujin originally worked on all of his robot prototypes and on his experimental serum, this is the room on which Kanako was injected with the serum and fell down.

20. #20True Labselective

    Keys: True Lab

    The True Lab is a secret section of Alphys's Lab, where Alphys's experiments on fallen down monsters using determination took place, amongst the victims is Kanako Ketsukane, Ceroba and Chujin's daughter. Nobody knows about this area of the lab.

    Entering the True Lab through the elevator leads to a lobby, with two doors to the left and right of the lobby, and a large door in the center, the left door leads room contains a large machine called the Determination Extraction Machine, and the right door leads to living quarters, where it can be assumed that the fallen down monsters/amalgamates were being kept in.

21. #21Determinationselective

    Keys: Determination

    Determination is a power that allows SOULs to persist after death. Determination is naturally possessed by humans. Should a monster acquire a high concentration of determination, their body melts, usually into an amalgamate.

22. #22Falling downselective

    Keys: Falling down, fell down, fallen down

    When a monster gets old, they enter a state referred to as having "fallen down." A monster in this state lies immobile and dies shortly afterward.

23. #23Amalgamatesselective

    Keys: Amalgamate, Amalgamates

    The Amalgamates are a group of monsters brought back from being "fallen down" by Alphys. She injected them with Determination during an experiment to harness the power of SOULs, and to find a way to break the barrier and, thus, escape the Underground. Unfortunately, since monster bodies do not have enough physical matter to handle Determination, the magic that composed them lost cohesion, and they fused together into strange and horrifying creatures, with somewhat paranormal abilities. Many Amalgamates appear to have regressed to a partial bestial state. Despite this, they can be spared in battle by reminding them of their old lives, since they retain their SOULs.

    Before they fused together, the Amalgamates had a brief time where they lived like normal, and during this period, Alphys had promised their families she would return them. Once they fused, however, she became horrified and ashamed of her failure, confining them inside the True Lab.

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