"I'd destroy the world to protect you" but it's a parent/child relationship
Hear me out,
Newton gave Luna the tightest almost-rib-crushing hugs everytime she got out of the solitary confinement room.
Nori did It too just not as often, theirs were usually after longer time spams; however Newton's were every single time.
It's not something Luna particularly liked, she just kind of accepted it after a while. She rested her hands on his shoulder blade giving a couple of kinda awkward pats, like saying "Ok, it's ok, I'm fine now... Let go, please".
Newton did it to, in a way, make sure that Luna knew, she was out, it's over now. To prove that what she was seeing wasn't an elaborated ilusion that her brain crafted to protect her from more trauma. To ground her in the moment, instead of dissociating to the point of no reacting when someone addressed her. To remind her she's loved and cared for and that she has them.
Now, when the current story is on the lighter side (firsts 3 seasons), their hugs are...scarce. It's not like they don't hug at all, it's more like the hugs they do have are not like them. It's mostly quick Eye-to-eye, one-armed hugs; and even when they have an emotional moment when there's physical contact It's mostly leaning into the other or Nori being the one who iniciated the hug or secret space-gang handshake, etc.
However, in the final moments of the story, after everyone gets out mind control, specially after Newton (for the sake of drama Newton is freed last, so bear with me), both of them start a kinda-final moment for the space-gang.
So, Newton is on the edge once he's freed and that's besides the whole trauma the fake world has give him. He remembers the damage he caused, there's flashes of moments playing at lightning speed on his head. The people he hurt, the things he said to the people he cares about, etc. And, for a second, he sees Luna and Nori also on mind control; the rest of the kids think he's going to have a panic attack. But Luna knows how horrible It is pulling out of mind control, and most importantly knows how to help him.
So, she ignores everyone and everything else and almost tackles him into a bear hug. She grounds him in the present, making sure he knows he's out, everything it's over now. We are here for you.
Of course, Newton bawls his eyes out and lets the whole situations process, while reciprocating the hug and apologizing for what he did. Luna reassure him there's nothing he has to apologize for.
Nori pretty much yoinks Lily up and sneaks them into the hug, like the good big brother ninja they're, also how dare they having a moment without them? There's a lot of feelings and tears, a ton of apologies; they let out what they need.
And in the time-skip, Luna is pretty physical with the affections she has in general and gives Newton a big hug everytime she sees him. (He swears that she has broken him a rib or two already)
[Ok, this was going to be part of a Headcanon/rant about Newton and his relationship with Nori and Luna, as well as his view on their escape, but It expanded into it's own post]