I'm curious about this one, as I just don't know, as well as being unsure whether I've missed an issue - more so that CGC hasn't acknowledged it, or at least from what I'm aware of ~
Secret Wars #1
Appears as an unseen being speaking to the various heroes and villains.
Secret Wars II #1
His silhouette appears on the front cover, and his shadowy appearance is seen by Molecule Man a few pages on.
Secret Wars II #2
He appears on the front cover with energy emitting about him, and first appears in human form.
Secret Wars II #3
He takes a permanent form, for which he remained for his entirely: that of black hair, etc.
Unless I'm mistaken in some form?
All comments are welcomed ~