Yeah, totally understandable. But you are still in the starting stage of designing the character, so you shouldn't worry much about how it'll look in 8bit and worry about how he/she will be, personality, possible attacks, a general look and whatever that could help. I find it easier to make it detailed (obviously not too much, but enough to make it look like an actual robot master) and when you start with the sprite you just clean out the unnecesary details.
Anyway, sorry for the long absence, been busy with a lot of things (and still am
) but I felt like doodling SOMETHING and decided to make my own take of Sirius.
Only added a bunch of possible attacks, but the orbs could be used for more stuff, like laying it someplace else and shooting bullets from it, reflecting Sirius own bullets, using one orb to absorb Mega's bullets and the other to shoot them back, anything works. The charged attack could work differently too, I just did that one to make some potential charged attack like Pharaoh's
I gave him a slight Egyptian look because wikipedia says it's related to them (by basing their calendar to it somehow, and it seems that it is related to Osiris too), the name sounds egyptian to me, the "scorching/brightest star" reminded of Pharaohman's weapon (the bigass sun you can charge and shoot) and the urban myth that egyptian learned everything from some aliens that came to Earth.
And Yllisos, I can't find the actual post, but I remember the crit you gave me from that attempt of the 8bit Arcturus, and yeah, you are right, it did looked umbalanced, so I made a quick fix of it too. The palette isn't definitive.