Out of curiosity, I googled what the name of this fella's species (Antikytheran) originates from, and it's named after an irl ancient hand-operated model of the solar system, found in a shipwreck in Greece. Here's a modern reconstruction of it.
It could be used to predict positions of celestial bodies years in advance, and it's considered to be the oldest known analogue computer.
Now, it looks like he has a circle on his chest that reminds me of one of the schematics of solar system on the apparatus.
His full name, Lycurgus, comes from a spartan lawmaker, who is credited for a bunch of socio-economic reforms.
He was preventing Herta from entering Amphoreus, and overall as far as we know, it's the will of the sky titan for Amphoreus to be isolated from outsiders, to the point where sky ships are not allowed. Through Lygus we learn that this might have something to do with a lord ravager of destruction being subdued somehow in this world, at least that's the reason he cites to Herta to stop her from intruding.
Finally, a leak of the upcoming weekly boss shows us what the sky titan, Aquila, looks like. Not gonna post it here, but you can google it. Idk if it's a stretch, but I have a feeling that Lygus is either closely connected to Aquila (maybe Antikytherans were creations of the titan, and he was entrusted to keep watch over Okhema), or he IS straight-up Aquila.
The similarities in the designs that I see:
- Aquila being a huge mechanical-ish bird with white plating vs his little helmet wings
- the circle motif on the chest
- it was mentioned that Aquila's eyes are the reason the sky of Amphoreus has light, and since many of their eyes were blinded, only Okhema remains lit... and Lygus has the eyes fully covered
Like, we have a precedent of a titan appearing as a human-sized non-playable character model and introducing themself with a fake name, he looks too detailed to be unimportant.