Have You noticed that Gregors E.G.O.s (With possible exceptions of AEDD) are more his semi-sentient arms E.G.O.s. They all either require sloth, or are sloth EGO, representing him letting the arm do whatever it wants. It also ties in with how both Lantern and Legerdemain corrosions are arm overtaking the body. And here we also have exception of AEDD which doesnt involve sloth, and in which corrosion its clearly gregor who's in control while corroded instead of his arm.
Alright, so, I'm going to take this opportunity to ramble about Gregor's bug arm in general. Not just how it related to his E.G.Os, but also in his other Identities and the main plot as well.
Strap in, cause this is likely going to be a more of a ramble than a proper guided analysis. Though, I will try to split these into sections somewhat.
Gregor's arm in the main story
Let's start by exploring what we know about Gregor's arm from the main story content. I'll be mostly focusing on Canto I, since that's where we get most of our info about Gregor, but I'll also dip into other Cantos and base Gregor ID's voicelines as I see fit.
So, Canto I. The Outcast. We learn a lot about Gregor's past here, about his trauma from the war, the way he and the other soldiers were treated after the war ended, and the way other veterans see him as a deserter and traitor due to him (arguably) being able to reintegrate into society better than the other soldiers.
We also learn where exactly his arm came from - a procedure performed on all G Corp employees and soldiers, some of which were actual children at the time. From the flashback we see of Gregor after the procedure, we see that he let himself cut the apple on the day of his fifteenth birthday, meaning he had the procedure when he was fourteen. A procedure that his mother performed on him, no less.
The Canto 1 dungeon itself takes on a rather interesting form. The first few encounters directly tie back to Gregor's past, with him being faced with other veterans who recognise him, and a Head Manager that Gregor himself recognises.
A Head Manager who is still stuck in that military mindset, still believing he's in the middle of a war because he's still struggling to survive just as much as he did during it. It's only when Gregor reveals that he was struggling just as much when he tried to become part of society does the Head Manager realize that Gregor wasn't the utter traitor he thought he was.
Things get interesting when we go further into Floor 2 of the Dungeon, where instead of a direct callback to Gregor's past, we get to learn about Yuri's story, having it directly parallel Gregor, as the two are both people who had to run and abandon their peers to survive a horrible event. It's an experience Gregor greatly sympathizes with, and I believe is one of the reasons why Yuri's death hits him as hard as it does.
However, the part I really want to focus on is the final floor of the Dungeon, the fathoms of Gregor's ego. We see one scene play out over and over again, each time details becoming skewed and more exagerrated. The aging bomb changes from aiming for a soldier's outpost to aiming for a Nest, going from only targetting the enemy to also hitting innocent civilians. Tomah goes from acting professional if a little energetic, to outright manic and obsessive over Gregor's status as G Corp's hero.
This, I believe, is extremely important to Gregor's character. The whole bottom floor of his dungeon is a symbolic representation of his PTSD. How he's constantly reliving his trauma over and over again, with his memories of the actual events being unreliable and more so driven by his recollection of how he felt during them, rather than objectively remembering what happened.
And this is where I go back to his arm, as I believe it too is a representation of Gregor's PTSD. The way Gregor describes his arm as a seperate entity, as something that acts on its own without his control or input, reminds me of how some people describe their experience with PTSD and trauma as the feeling of always being afraid of a monster that could creep up on you at any moment.
We see that Gregor is somewhat capable of hiding his arm, as shown in the flashback CG of him on the subway, where he hides that arm under a sleeve and behind his back. Most of the time, he can hide his trauma and live as normal of a life as he can, joking about the propaganda posters his face is still on.
But all it takes is one small thing. One small trigger. And just like that trauma comes crashing back to him, his arm goes out of control, attacking whatever or whoever triggered it as if it were still on a battlefield, fighting for Gregor's life. Just like Dante's words throw Gregor into a traumatic flashback, the seemingly kind act of a stranger at the wrong time threw his arm into a frenzy.
An important part of that is revealed in a Canto II cutscene, where Gregor admits he doesn't know what exactly could trigger his arm to "rage out of control", as he puts it. For all he knows, the stimulation caused by dancing could be enough to do it. It also might not. The fact that something as seemingly innocent and neutral as dancing could be a trigger, and the fact that Gregor himself doesn't know all of his triggers, both further point to this metaphor being intentional.
Plus, there is the motif of Gregor's arm regrowing no matter how many times it's cut off. Just like one can't just get rid of one's trauma and PTSD, Gregor can't get rid of his arm. It's something he has to learn to live with. Like he says in one of his Chatter lines, he had to accept he's stuck with it, like it or hate it.
Gregor's arm in other Identities
So... an interesting thing happens to Gregor's bug arm in his alternate Identities. Other than G Corp Gregor, who'd still have gone through the procedure as he did in the main world, all other Gregors all lack that arm, having a prosthetic in its place. And likewise, the arm means something different to each different Gregor.
We already discussed how LCB Gregor's arm is a metaphor for his PTSD, a symbolic, physical manifestation of his trauma.
G Corp Gregor's arm is actually quite interesting in this regard. It comes from the same source as LCB Gregor's, and has a similar role of serving as a physical reminder of sorts, but it's the details of what it reminds Gregor of that is different here. For G Corp Gregor, his arm is a reminder of why he's fighting in the war in the first place - because he didn't want to helplessly watch from afar. While he's aware it and the other side-effects of the augmentation won't let him return to civilian life, he claims he doesn't regret it.
It's a twist that makes sense considering his situation. Whereas LCB Gregor is a Gregor who left the war with the arm being a grim reminder of what he had to do during it, G Corp Gregor is a Gregor still in the middle of it who uses his arm as a way to remind himself why he's in this situation in the first place.
Now, we got to our first prosthetic arm Gregor - Liu Gregor. Here, Gregor has an almost utilitarian view of his arm, seeing it as a source of fire for his cigarettes and as something that helps him in combat. He specifically points out how his prosthetic arm can't feel pain, calling it outright invincible because of that fact.
It's a fascinating subversion to how LCB Gregor and even G Corp Gregor view their arms. Whereas for them their bug arms have an almost sentimental value in a way, being reminders of their trauma and the reason they're fighting respectively, Liu Gregor's prosthetic arm is almost like an afterthought to him. Just something to light a fire and fight with.
Though, I do think the way Liu Gregor seems to focus on the fact his prosthetic arm feels no pain specifically is important. Considering his Core Sin of Sloth and how much Liu Gregor seems to try to shirk his work, claiming that straining himself is a good enough excuse for a whole week of rest... There's something to it, I think, though I can't quite put my finger on it just now.
Chef Gregor is an interesting Identity when talking about Gregor's arm, because it has the least importance out of all the Gregor IDs. All we learn about Chef Gregor's arm is that his mechanical one can get sore (implying it's of high-enough quality to feel pain, interesting when you contrast it with Liu Gregor's prosthetic), and that his old arm is implied to have ended up as an ingredient (though how much of that is the truth and how much is Gregor fucking around with Dante is unclear).
If Liu Gregor's arm is an afterthought in his eyes, then Chef Gregor's arm is a joke to him. There's a level of casualness and levity to the way Chef Gregor talks about his arm, to the point it just feels like just another ordinary part of his life... as ordinary of a life as being a cannibal chef can be.
Honestly, it's kind of refreshing to see his arm be treated as just another part of him and nothing more than that. As much as I love digging into every single dialogue line and design choice for deeper meaning (and I appreciate just how much this kind of reading is facilitated by the way Limbus Company is written), sometimes a prosthetic arm is just a prosthetic arm, no strings attached, and I think that's great.
Rosespanner Gregor is up next, and here we get to see another interesting take on Gregor's arm. For this Gregor, his prosthetic arm is actually of his own creation. His invention, his to-be workshop product, a machine he created to facilitate his dream of leaving Rosespanner and starting his own workshop.
It's probably the most unique interpretation of his arm that we see thus far. It's not a reminder of the past like it is for LCB and G corp Gregor, and it's not just part of his everyday life like Liu and Chef Gregor. No, for Rosespanner Gregor his arm is an accomplishment, a path towards a more successful life. I don't know about you, but I personally find that very interesting.
Finally, we got the most recent Gregor - Zwei Gregor. Similarly to Liu Gregor, Zwei Gregor sees his arm as an asset, a trump card he hides under a glove to reveal when his client is in danger. In fact, his prosthetic arm is shown to be strong enough to not only wield a zweihander without the help of his other hand, but also to stop a strike that could have bisected a person.
Zwei Gregor never actually talks about his prosthetic arm directly, only alluding to it due to him hiding it as a sort of surprise tool that will help him later. However, I believe it does show that this Gregor views his arm in a purely utilitarian manner, similarly to Liu Gregor. An interesting connection, and I suppose it fits with them both being Association members.
Gregor's arm in E.G.Os
That's right, we're finally talking about the thing the ask was Actually about. I'm so good at answering questions in a clear and concise manner. /s
Starting off with Suddenly, One Day, something about it immediately caught my eye. For all the other base E.G.Os, the striped "prisoner" garb is worn by the Sinner in question (Faust included, while she doesn't wear it in the illustration, she does have it on in the attack animation), however in Gregor's case, the striped cloth is wrapped exclusively around his arm.
Notably, it doesn't look like it's some actual piece of clothing that Gregor could have worn but just didn't, no those are actual wrappings specifically for the arm. It's a fascinating visual when you think about Gregor's arm as a representation of his trauma and PTSD. It's not the Gregor everyone sees that's a prisoner, it's not the person he acts as while living in a society, it's his traumatized self he keeps hidden that's the actual prisoner to the trauma he's endured.
As for the Library floor symbols on those wrappings... Yeah, I have no clue. The only connection I can make is that Gregor is Jewish and the symbols also represent the different Sephirot from the Tree of Life, so it could be a reference to that.
The attack itself involves the arm bursting out of the prisoner wrappings and attacking against Gregor's will. While this could represent how his arm can go into a frenzy out of Gregor's control, there's another interesting interpretation I just thought of.
Each finger of Gregor's frenzied arm in this E.G.O takes on a different form. I don't know what the common theory is on those, but I believe these are meant to represent the factions that Gregor fought on the side of during the war. The bug-like finger represents the old G Corp, and the smoking red finger could represent the old L Corp, the source of the smoke during the Smoke War. In Outis's Uptie story we're told E Corp and F Corp also fought on that side of the war and could potentially be represented by two of the fingers, but since we don't know how canon that is to the main world, I'm not going to try and guess which of the fingers represent them.
With all that said, I believe in this way Suddenly, One Day's arm could also represent the war itself, specifically the side of it Gregor has found himself on, how he was effectively made the leader figure of that side against his will, and how despite being the face of the war he himself never had any real control over how it went.
...Okay that was a lot, I'm going to hopefully speed through the other E.G.Os because I'm not gonna fully analyze those (and I already analyzed AEDD anyway), so.
Legerdemain has Gregor's arm take on the form of an apple on a stem, the roots of which are spreading all over Gregor. Gregor seems to have some control over his arm here, but he does seem to somewhat struggle with it, having to hold onto it with his other arm and hesitating before attacking.
Like you mentioned in the ask, the corrosion here involves the branches (and now also maggots) completely taking over Gregor, with the maggots within the apple being the ones controlling his actions here.
I think Gregor's arm here is interesting to interpret, as it seems to generally represent himself, or rather how he's viewed by others. During his Awakening, it's shown as a golden apple, representing the golden poster boy that Gregor was seen as during the war. However, in the corrosion it becomes rotten and overtaken with maggots, showing that despite his seeming priviledge and higher status he was seen as just as much of a rotten pest as the rest of the soldiers.
Next up, Lantern. Here, Gregor's arm takes on the form of a branch and a fairy, the only visible part of the Abnormality Faelantern. In the Corrosion, Gregor becomes overtaken by the plant, specifically becoming caught by the underground portion of it, the true core of Faelantern that uses the branch and fairy as a lure.
In this case, I believe Gregor's arm is meant to represent the propaganda he was involved in creating. The "tales" his fairy is reading are the tales of old G Corp's victories and the honorable soldiers fighting in the war, trying to bring more people willing to fight on old G Corp's side. However, his Corrosion shows that he was just as caught up by the source of that branch as anyone else captivated by the propaganda, he was suffering during the war just as much as everyone else.
Now, onto AEDD. I already made an analysis on that E.G.O right here, but to summarize: AEDD represents the abuse Gregor went through at the hands of Hermann, and it shows him acting out because of that abuse in a way that mimics her, with him fully putting himself in her role when he Corrodes.
In this way, I think Gregor's arm while using AEDD represents something similar to the one in Legerdemain - it represents Gregor himself, though in this case it represents how Hermann sees him.
Just like you also pointed out, Gregor is fully in control if his arm in this E.G.O, and yet it's the one E.G.O where his arm is most clearly a seperate entity - taking on the form of a full shock centipede. I think to understand exactly what it means, one should interpret that arm centipede as Gregor, while the Gregor using AEDD should be interpreted as a representation of Hermann.
This, I think, makes the AEDD arm make a lot more sense. The reason why the arm appears to be a fully seperate entity, yet is completely under Gregor's control? Because it represents how Hermann had full control over Gregor, seeing him as another bug in her army of pests, yet special enough to dedicate more of her attention to.
Perhaps that's why the AEDD Corrosion involves both of Gregor's arms turning into centipedes, with one of them glowing with electricity. Hermann's bug soldiers are her weapons, her arms in the war, but Gregor is a special one. A pest that got to glow a little bit brighter than the rest.
To summarize...
Man, Gregor's arm tells us a lot about his character and themes, huh? From being a symbolic physical manifestation of trauma, to a reflection of how other people view him, to just being your everyday prosthetic arm. And I think it's Really Fucking Cool, so I hope you all do too.
