The Ascension of Contracted Spirits

[Beast Mastery][Summoning][Pets][Evolution][Development]
Demon, Savage, Nether, Damnation, Mechanism, Soldier, Medicine, Abnormal, Witch, Immortal, Ferocious...
This world is a world of monsters, filled with countless diverse "Fond Spirits".
But in this world, humans also wield the power of "occupation classes". Once awakened, they can have Contract Imprints, allowing them to form contracts with the monsters, creating entirely new bonds.
[For Instance]
♦F-level Occupation Class "Manicurist"- helps the Fond Spirits trim their claws, making them beautiful, or sharper.
♦E-level Occupation Class "Hunter"- marks and chases, closely collaborating with the Fond Spirits, the most classic hunting occupation class.
♦C-level Occupation Class "Puppeteer"- manipulates Fond Spirits at crucial moments, making their strikes more precise and powerful.
♦B-level Occupation Class "Midwife"- assists pregnant Fond Spirits with health checkups, giving random blessing effects to the newborns.
♦B-level Occupation Class "Mechanic"- under the right conditions, modifies the Fond Spirits, turning them into semi-mechanical beings.
♦A-level Occupation Class "Dragon Knight"- rides dragon-type Fond Spirits into battle. Man and dragon unite, becoming invincible.
♦S-level Occupation Class "Arch Warlock"- intensifies the elemental properties of Contracted Fond Spirits and seals their skills in advance to execute forbidden spells for the second time.
...
♦C-level Occupation Class "Fitness Trainer"...
♦D-level Occupation Class "Flame Thief"...
♦A-level Occupation Class "Mysterious Merchant"...
♦B-level Occupation Class "Gourmet"...
♦Special Occupation Class "Brave"...
...
(I already have a completed work of 3 million characters titled "Master of Pets". "The Rising of the Fond Spirits" is my second work, a Beast Mastery tale with entirely original settings, you're welcome to try it out!)