Spirit's Races/Ranks (From Least To Most Dangerous) :

4th Rank Spirits Also Known As "Food" : Very Common (Rarity varies from the colours) + Pretty harmeless can cause very minor omens 
-Spirits Shaped Like Souls (Simply Called "Âmes")

3rd Rank Spirits : Pretty Common + 
-Spirits > Has a Spirit's Mask to Shapeshift
-Nymph (Their Elements) > Has nature related abilities
-Omeners (Ink) > Divination Ability
-Gems (Gemstones) > Gemstones
-Guardians (Their Elements) > Has Nature related Abilities and Features

2nd Rank Spirits :
-Ombres (Fear And Woe) > Dark Fur
-Cauchemars (Nightmares And Dreams) > Eyes on their Tongue
-Incantateur (Voices) > Symbols Mouth
-Vampires (Foxes Blood) > Long canines
-Cannibals (Foxes Flesh) >Hardly resist to Fresh Meat
-Beasts (Âmes) > Horns + Oni Teeth
-Kitsunes (Âmes) > Multiple Tails

1st Rank Spirits :
-Hunted Hunters (Other Spirits) > Scars on their Neck
-Necromancer (Diseases) > Scars all over their Body + Demon Tail
-Forgotten Gods (Power) > Old Artefacts