I found Riebeck's Dark secret (SHOCKING)

[Solar]

So, I'm just playing outer wilds normally, and i decide to detour to brittle hollow. I almost die like twice and barely made it off falling rock, and i decide to go to riebeck's camp just to see if i picked up without knowing any new "I found something" options or something. I get there and i dont get new options, but and im just chatting, but then i realize: Every character I've seen in game has only 3 fingers, and they're blue, its just part of the Hearthians. But i noticed, not just does riebeck have FOUR, they also are NOT blue, they're like the color of Solanum's which is a nomai. Also as visible on nomai statues and solanum they seem to have big heads, and, ever noticed how small Feldspar's helmet is compared to Riebecks? If feldspar's helmet was the size of timber hearth, Riebeck's would be the size of the sun. And he's always nervous, which seems to be a trait no other Hearthian has. Slate literally goes on about how he hopes those retro-rockets don't break again, and if they did, youd literally be dead, and talking about how autopilot can fly you into the sun, but that changes nothing apparently. Like legit take a close look at riebeck next time you get the opportunity, and look at solanum's hands, and every other character even shown in-games head size and finger amounts/color, and tell me riebeck aint sussily seeming Nomai.

[Fear Ghoul]

I just checked for myself and you're right. I wonder what it means.

[lieutenantkirtar]

Don't the Nomai have three fingers as well?

[roomba of doomba]

The "body" of the nomai is a spacesuit, just like the heartians

[lieutenantkirtar]

引用自 Mohguy：

I believe that the extra finger is just to "legitimize" the fact that he plays the guitar and therefore that he is more skilful, it's a detail of the style.

That is a possibility, we see another Hearthian (Gneiss) with a banjo, but he is only tuning it never actually playing anything on it.