ehh I'm conflicted? like I have techno-organic OCs, but they're completely unrelated to Sari in any way shape or form. Their backstory is also completely different (since Sari's backstory is still kind of incomplete, this isn't TOO difficult to manage).
I don't know if that really counts? I mean the only similarity is that they're techno organics. That's all.
I guess as long as their character is not copied it's fine. This means physically and personality wise. I see a lot of OCs that are basically clones of canon characters: and to me, THAT is boring and unoriginal. Like, if you want your OC to be taken seriously, I think effort should be put into it!
I get what you're trying to say. what I've been doing is that my OC got created in the same way as a canon character but after that they are completely different both story and personality wise. They aren't even related because they are both artificial creations.
As for your techno organic OCs, it's entirely possible that if Sari ended up on Earth then others could have too. There's a difference between copying a canon and just creating a member of a rare species.