The eyebrows. I know I keep pointing this out, but the eyebrows show us there's something about old Germa and Vinsmokes he's keeping secret.
He took great effort into hiding Judge's face everytime he was helmet less so we couldn't see his face. Then after Nika is revealed, we get Judge's face on the cover story with Nika brows.
Definitely. Yonjis winch powers remind me of what older type robots can be like too, like Blitzcrank from League of Legends ofc or maybe that giant robot from Egghead.
Oda is definitely inspired by Laputha amongst other things and Germa also uses these giant shails we've never seen before and create a mobile kingdom, that can separate itself too and reattach?
Judges eyebrow mystery bothered me for SO long and now we've seen them, it was worth the wait but also ironically agonising now because he resembles Nika with them as you said ofc.
Now I'm actually invested in Germa snd Vinsmoke history and it makes him marrying someone called Sora way less of a coincidence now even.