Luna's Father (Mr. Hernandez) could be keeping a big secret?
I don't think Mr. Hernandez has anything to hide. He just seems normal, but I did notice similar things to you, mostly that most of the story so far gets there because of Luna.
Luna is the one that gets you the implant in the first place. She's giving out flyers, supposedly to promote her dads business. But the flyer is written in eternum's language, which she admits barely anyone even knows, even among eternum players. So what would be the point of writing the flyer in that language, the ones genuily interested to win an implant would never really speak the language. So the flyer seems more like an excuse to tell Orion about the competition so he can win an implant.
His first big breakthrough is finding the gem of doom in the red herring server, which Luna brought us to. Luna also introduced us to Nova, a super-hacker who also happens to be a highly skilled eternum player with a weapon of atlas. Nova, who just happens to find a lead on the third weapon of atlas right after so we can find it.
None of the main story, not Calypso, not the heist, not the dinner, would be happening without Luna subtly pushing Orion in that direction.
I don't think she will turn out to be evil or something like that. I am pretty convinced that she is working with the Syndicate. After everything she is also the one who recommends us that we follow what the syndicate said in regards to the letter.
But so far the Syndicate only helped us. So either they will not turn out to be evil, or if they do then luna will not have been in the know about it.