The Ascension Of The Favorite Spirit

[Beast Control] [Summon] [Pet] [Evolve] [Develop]
Monster, barbarian, underworld, prison, weapon, soldier, medicine, Asia, witch, fairy, fierce...
This world is a world of monsters, with countless "favorites" of all kinds.
But in this world, humans also control the power of "authority". Once awakened, they can have contract marks and sign contracts with monsters to form a new bond.
[For example]
F-level "manicurist" can help the spirits trim their claws to make them beautiful or sharp.
E-level power "Hunter", marked pursuit, close cooperation with the spirits, the most classic hunting power.
?C-level "Puppet Master", able to control the spirits at critical moments, exerting force more accurately and more powerfully.
? B-level authority "Midwife", helps pregnant spirits to undergo physical examinations, and gives random blessing effects to newborns.
? B-class authority "Mechanic", under the premise of meeting the conditions, transform the spirit into a semi-mechanical body.
?A-level "Dragon Knight", who rides a dragon-type spirit to fight. Human and dragon become one, making him invincible.
? S-level power "Super Mage", strengthens the elemental attributes of the contracted spirit, seals skills in advance to complete the second forbidden spell.
...
?C-level authority "Bodybuilding Coach"...
?D-level authority "Fire Thief"...
?A-level authority "Mysterious Businessman"...
?B-level authority "Gourmet"...?Special powers "Brave"...
...
(The work "The Master of Pet Beasts" has been completed with 3 million words, and "The Ascension of the Familiar Spirit" is my second work, the beast-control style, with a new original setting, welcome to try it!)