[quote=@Sypherkhode822]
I'm thinking that the entity would be a mysterious denizen of the Void that was known as 'The Hidden God' or the 'Eyeless God'. My character would have entered the Void near his domain as a child, and he took her under his wing, training her and turning her into an agent for his actions. The Hidden God has had a fairly extensive network built by now, he maintains over a dozen mystics, and has numerous cult cells across the world following his orders through the mystics. His actual desires remain unknown, though he has played a huge role in human politics. The Hidden God had given favors to the CIA during the Cold War in exchange for earning it a positive standing with the U.S government and the Division. It maintains a publicly known cult house in Berkeley, and often tries to indoctrinate college students with a New Age front. It's highest known membership is on the West Coast, though there is another cult masquerading as a protestant church in the Baltics actually run by the Hidden God.

The fog is originating from the layer of The Hidden God, and he ends manipulates it for the Mystic. Basically the Mystic opens the portal, and The Hidden God has full control over fog that enters through it. Things that The Hidden God can do with the fog include:

Shape the fog into rigid shapes, giving it weight

Direct the speed and direction the fog flows

Change the makeup of the fog, making it acidic or flammable. 

My character would communicate with the Hidden God, expressing what she needed while he in turn would shape the fog into what she requested.
[/quote]

This is a nice idea, but I feel it strays too far away from the Lovecraftian influence of the setting. Any interaction with cosmic beings in the Void would result in either suicide or madness. You also have to think about the story of the roleplay, and the person that recruits the characters. Why would he/she contact a person with this kind of connection to the Void for what is an effort to contradict the Void? But, I have a compromise, as I don't want to give you a blunt no.

So, your character could have seen this cosmic being during their time in the Void as a child, but there was no communication or interaction of any kind. The fact that your character saw it and didn't gouge their eyes out is extraordinary enough. After that, whatever cult that worships this particular cosmic being came in contact with your character, and [i]they[/i] trained your character. However, whatever the cult have suggested that this being has said or preached is in fact their word, not the being's. The cult has named it 'The Hidden God', not the being itself. Beings of the Void have no interest in human affairs. There is no communication other than cryptic visions, images, and dreams that people with telepathy can pick up.

As for the fog, it will have to stay in its basic form and function. When you character uses the ability, the area is filled with thick, dark fog from the Void. It is quite powerful in itself, as it can make you nearly invisible with the right clothing and movement. The magic in this roleplay is based on Bloodborne, which in turn has pretty low-ley abilities that aren't even classed as 'magic'.

How does this sound?