The One Infinite Creator becoming aware

[anagogy]

So is mind/body/spirit complex a capsule for one of creator's perspective?

Yes, a m/b/s complex is an "eye" for the Creator. We are cameras with feet.

Will an individual entity retain it's individuality after reaching octave?

That's difficult to answer adequately when you understand how consciousness functions outside of time. For the most part, I would say: no. But understand, there is no such thing as loss in the one creation. However, I'm fond of analogies, so as an analogy, take the cells in your body. Lets say individuals are like cells, and lets say when you reach octave, your perspective is no longer from the vantage point of the individual cells, but rather, it is the perspective of the body as a whole. The individual cells didn't go away however -- they are still there -- but you are seeing things from a different vantage point in time/space.

The first density is where creator put itself to very limited awareness/perspective to learn to interact itself, is this correct?

The first density is a threshold of consciousness where the creator is knowing what is like to be a random, non-unified, raw expression of vitality. It puts itself in a position to grow/learn not because of anything it needs to achieve from the grow/learning, but rather for the sake of the experience of grow/learning in and of itself.