Rambling but I've always liked Talon in a certain way despite his shameless copying of Every Edgy Assassin Ever because I thought he was weirdly positioned so perfectly to encapsulate and interact with being both the truest embodiment of all Noxian ideologies while also being in a plot that (imo) would eventually refute it.
Webtoon Talon is a travesty wow did they really mess up anything interesting he could have been (also directly gazumped cassiopeia who was the D sibling most directly associated with the Rose. Now she's even more redundant than ever).
Talon is so heavily defined/shaped by the dehumanization that goes on in Noxus. He doesn't see the value in people in any way outside of their pure utility, and specifically their utility in murder and violence. This fits with his backstory growing up in the gutter seeing the dregs who were too “weak” to live including his brother who he killed at a moment's notice in order to better himself like a crab in a barrel. Extending along into his relationship and loyalty to Marcus as he is only kept around because Marcus sees him as useful and as a replacement for the last child that failed his expectations in Katarina. Talon at this early stage is totally fine with this and in fact valorizes/rationalizes it. Conditional “love” and or support is a good thing as it is only those who are willing to do what’s needed who don’t end up in the gutter like his brother. This need to maintain his usefulness as a weapon could be a large motivator for his continued loyalty to Marcus and desire to find out what happened to him.
But like there was a good potential dichotomy to explore with Talon being so utterly devoted to Marcus. Not only is that a queer thing for a noxian to be so devoted to anyone like that as Noxus is deeply impersonal, which in and of itself would be intriguing, but also in a way he is reliving his relationship to his brother who had so much faith in Talon and was so utterly devoted to him but in the end Talon threw him away like a piece of garbage. Now with Marcus he's had the dichotomy flipped without really knowing it playing the role of his brother and being devoted to someone who is not likewise devoted to him and will treat him the same way: disposing of him like a piece of garbage the moment it is advantageous.
And either he doubles down on this cycle of devotion and betrayal or comes to some kind of realization of his role in it.
Imo the ideal overall narrative for ducuteau children in general including Cass eventually should have been them slowly building up a fucked up family together as each gets betrayed and left alone and fucked up by the forces of "greater noxus" that they each respectively find themselves enmeshed in (Kat with Swain, Cass with the BR, and Talon with Marcus). They're all so messed up and trapped in the dynamics of people that raised them to inherit their fucked up legacies but also trapped in the Noxian culture which rejects the family, tells people to only think of themselves and their own ambitions, and extols the virtue of stepping on those around you to make yourself better off.
Talon, weirdly enough, had the easiest pathway to becoming aware of his own entrapment. Marcus' death/disappearance created an odd situation where he could remain devoted to someone forever without getting backstabbed as a detached form of love but also never able to backstab in turn. Endlessly seeking the vengeance for his fallen master that will never have the chance to throw him away but he is also deprived of any specific desire or ability to overthrow him either. He can only watch from within and without as a unwanted intruder on the DuCuteau house in a frozen stasis that Marcus' disappearance had left the House in, but somehow more devoted to said house than the either two siblings by sheer virtue that Marcus never got the chance to kill him or be killed before disappearing.
Obvious to us now the Marcus disappearance plot was just a hook with no planned endgame but in a better world Talon could easily have found this odd position between the siblings that could build bonds that fall outside the paradigm of living life for yourself at all costs no matter who you step on. Inadvertently, obviously, at first as they simply find that they have mutual connections they can work with. Over time growing into something closed off but familial as the forces of Noxus itself try to strip them down. Kat being used by Swain for the "greater good" of the empire (and in becoming Swain's "messenger" she has also become inexorably tied to being Swain's fall-guy), Cass being roped along by Leblanc and the Rose, and Talon stuck all the while in this un-cycle between himself and Marcus that seems to have no end. But unlike the other two he is the most trapped by his own self. He is still in that gutter in the system that destroys you but forgotten and ignored by it.
He's the only one of the three that can escape because Noxus can't even see him, and in turn he might be able to help the others escape as well. Best exemplified with Katarina as she cannot ever continue to live within Noxus as long as she was Swain's direct representative. Once Swain slips she will find that all that bravado and purposefully showy antics she so enjoyed to keep attention on herself will mean that all the knives will be pointed at her just as much Swain. But Talon can choose to not be one of those knives. He can choose to not be that same boy in the gutter that killed his only sibling for a fake-love that promised ascension to the top of Noxus. Helping Katarina escape, and even faking her murder by his hand to help keep her safe, on the outside he is acting like the perfect Noxian. Bringing down the failed sibling to seize all power to himself, but in actuality saving that sibling for what comes closest to selflessness that Noxus can ever have.
There is a narrative here that speaks to me that is subversive to Noxus with Talon being, on the outside, the perfect example of Noxian values as some gutter rat ostensibly climbing through skill and cold blooded violence to become the head of a major house and power within the empire, but that in actuality his narrative behind closed doors involves him learning the human value of others, rising above the dog eat dog philosophy taught by Marcus and Noxus as a whole, and him finding a sense of belonging with people he loves within the DuCuteau family not simply based on only what utility they bring. A poster child who actually isn’t a posterchild at all who in fact rejects the values the people on the outside want to apply to him.