On the blue planet (earth), it's entirely possible for someone to invent a job class by using a crystal fragment that can only be found on the four crystals (fire, water, air, earth). However, the job class has to be very useful in combat (Such as attack, support, and heal). If someone who invented a job class that has no abilities in combat, then it'll be useless in combat. The Caerenth empire established a law that only certified individuals are allowed to invent job classes, anyone who is illegally making job classes shall pay a hefty fine and/or sent to jail if they can't pay for the fine.

Blue planets job classes (So far):

1. Scanner- a job class invented by the empire to use their visors to see things clearly and to scan enemies to learn abilities, they're pretty much a futuristic version of the blue mage. Eric involuntarily became a scanner before the start of the story, and he has learned some monster abilities. The Scanners dressed in white suits that resembles an astronauts space suit.

2. Dragoon- dragon themed knights originated from the mountainous region of Eopoten, they wield spears as their main choice of weapons. They jump high and land on their enemies for massive damage, but on the Blue Moon, they fall very slowly due to the moon's low gravity. Siegfried used to be a dragoon before he changed his class to become a Scrubber, because of the dragoons aforementioned weakness on the moon.

3. White mage- experts of using healing and support magic, the White Mage job class has been around for hundreds of years (due to the discovery of the white healing waves emanating from the crystals). Sonya has trained to use the spells cure, poisona, blindna, and the support spells before the start of the story.

4. Black mage- experts of using attack and status ailment magic, the Black Mage job class has been around for hundreds of years (due to the discovery of the black attack waves emanating from the crystals). Laura has trained to use the elemental spells fire, blizzard, thunder, and the three status ailment spells before the start of the story.

5. Scrubber- a recently created job class made by the late former bathhouse worker named Cicero, it allows anyone to use soap and water for support and offense. They only wear towels, in which its just enough for the theme for the scrubber.

The Lunarians also invented their own job classes (few of the job classes are spellcasting) before going into hibernation, there's at least twelve made and are put into storage within the crystal room upstairs in the Crystal Palace. These job classes within the crystal fragments are different than the blue planets due to being unheard of, but functions the same as the ones that the people of the Blue planet uses.

Lunarian job classes (So far):

1. Mascot- a job class that excels at attack and support, each of the attack/support abilities have their own theme depending on whoever uses this job class. Anyone who changes into this job class wear different costumes (depending on the person) with its own theme (example: if Eric changes into the mascot job class, he would wear a behemoth themed costume).

2. Dreamer- masters of dream and sleep, this job class can put enemies to sleep with the counting sheep spell (functions just like the sleep spell that black mages use). When the enemy is put to sleep, then the Dreamer can use their branch of magic to inflict nightmares to lower stats and deal damage. However, there's a chance that the Dreamer is put into the sleep status at the start of the battle. Not only that, they can put their allies to sleep to gradually recover hp and mp. They wear pajamas with star and moon theme, and night caps on their heads.

3. Psion- this type of mage job class uses psychic powers, a different branch of magic unheard of on the Blue planet. They can use the levitate spell to float above harmful teraine (functions like the white magic spell float), and use other deadly psychic powers on their enemies. They wear lab coats and other futuristic clothing, but they're barefoot.

4. Festivalist- party goers that bring the fun in the battle by using festival themed abilities, from sparklers to even fireworks do they dazzle and damage enemies. Not only that, but the Festivalist can summon elemental goldfish and status inflicting masks. Female Festivalists wore kimono, and male Festivalists wore old fashioned Japanese outfits.