Is Arcane Really Saint Germain? Yes. However:

However, I also understand that there are other incarnations of Saint Germain whether we are talking Meridian, His Oneness Time Lord of Earth or even Flame, the time traveling 10 foot tall Octopus evolved from the Great Northern Pacific Octopus when some of his kind were taken to colonize another planet along with humans and robotic constructs. When the Humans all died the Octopus group had to create their own civilization partly through the robotic sentients.

Then we have Merlin, Michaelangelo, Milarepa, Saint Francis of Asisi and others.

So, at this point we are left with: If all these incarnations are incarnations of Saint Germain including Joseph the Father of Jesus (who was and is the present Galactic Sentience) then what are we to do with all of these incarnations?

I would say it's up to you how you handle stuff like this.

Because from what I have found out we can add to this likely the Dalai Lama is one of Saint Germain's incarnations too because all of them are incarnations of the Creator who created this Galaxy.

What are we to do with all of this?

Your Guess is as good as mine.

By God's Grace