Scarlet King Interpretation: YHWH
So I’m just going to say it:
I think the Scarlet King could easily be interpreted as a twisted view of Yahweh, the Christian God.
Think about it:
The Scarlet King ate and conquered the other Gods in some interpretations. Yahweh was originally a storm god of the ancient Mesopotamian’s polytheistic religion. However, the other Gods were eventually absorbed by Yahweh in the transition to a Monotheistic religion. In a sense, Yahweh “ate” the other gods.
7 seals, 7 Chains, 7 Brides, the commonly associated number of God, 7.
He is usually depicted with a red crown, similar to Gods own Crown of Light.
If you read through the Bible, God is actually disturbingly cruel and violent. Quite capricious and envious. He asked his worshippers to do some genuinely screwed up stuff. Stuff that eerily lines up with some of the themes of the Scarlet King. (SA, Slaughtering, Genocide, Treating women as property, unquestionably obeying his words)
A common theming of God‘s showing of his powers involves Water and Blood specifically (Flooding the earth, turning the rivers to blood, blood raining from the sky, blood like flames, Jesus having many miracles involving his blood.)
They beared a kind and benevolent son to save humanity (SCP 999, Jesus Christ)
I could definitely see The Scarlet King as a Demonized version of Yahweh.