Big Yellow

Hastur, known for being part of the Cthulhu mythos but originating as a deity mentioned in a short story by Ambrose Bierce

Hastur, aka The Thing in Yellow, the Golden Shepard, Master of the Slithering Sea, That Bastard, Big Yellow, and many other names that incorporate the word ‘yellow’. It’s kind of his schtick.

Stationed on the moon Charon within the aformentioned slithering sea and served by multitude of Star Spawn servants (essentially small clones of himself), he seeks to conquer Pluto as an important stepping stone to becoming the dominant Great Old One in our Solar System. The ongoing resistance of the Mi-Go and their Ancestor Warriors have been a continual thorn in his side. 

One Truth and One Secret

Strewth is psychologically and physiologically unable to tell a falsehood. Strewth's origins vary, some say they're a life-form grown from a Bejesus feather, others say that they're another of Gosh's divine messengers. People would ask, but Strewth hasn't been seen for years.

No one knows who Snap is.

Romantic Warrior

Cupid is dead, you face the new Valentine's day mascot.

Good/Bad/God/Demon

Abraxas, from Gnosticism. Usually depicted in the form of an anguipede, a creature with the head of a rooster and legs of snakes.

Messenger of the Minced Oaths Pantheon

Odgka (pronounced Odge-Kaa), the official messenger of the Gods, an appointed mortal temporarily transformed into a demi-god at certain points of their life whenever the gods need a gofer.

That Hallowed Aurochs

Unfortunately for the Phoenicians, their holy cow was much more demanding.