Then for the sake of argument that entity would lack evidence.
I'm not asking that you understand the entity "exactly" but you have to at least try to begin to give me info on it that fit's into this idea that I can access if you want to call what your doing evidence, rather than say supposition.
If you don't have any understanding of any of these things with regard to the entity in question then what you are putting forward is simply not evidence.
Consider the great chain of being as the Scholastics understand it:
Inanimate matter = lowest
Plants
Animals
Humans
Angels & other spirit beings
God = highest
We can understand a progression regarding how much we can understand things merely in terms of information. For inanimate matter, information can completely describe it. If I have a rock, there is no life or thought or self-awareness or consciousness within the rock. The measurable, verifiable information about the rock tells us everything about the rock.
If we move up the chain to plants and then animals, we find that information tells us most of what we might want to know, but not all. If I look at my dog I might get plenty of information how he acts, reacts, and operates. Nonetheless he has interior thoughts, perceptions, and so forth. Thus visible information cannot fully describe how he acts, reacts, and operates. Part of his existence is purely interior, not accessible to measurement.
If we take another step up the chain to humans, we find beings whose life is to a considerable extent interior and not accessible to measurement. We can measure a human being's body and talk about how
that acts, reacts, and operates. There's plenty of information to be had there. But the interior life consisting of a human's consciousness, intellect, and so forth is not measurable. I have no direct access to the interior of any other human besides myself. Hence I have no information about the important aspects of a human being; that is to say, I have no measurable, verifiable facts that would meet the standard you've set for "evidence".
So
if spirit beings and God exist and have the nature that traditional Christian theology ascribes them, being higher on the great chain of being, it would make logical sense that the progression would continue for them. Their life would be more interior, and thus less measurable or scientifically verifiable. God, being highest on the chain, would be entirely so.