Each character in the spyfam has their strengths and weaknesses, but we never talk about how their weaknesses just makes sense for each of their personalities.
Anya, a vesper, can read the thoughts and intentions of anyone around her. Although she struggles with understanding and processing this information (she is only five after all), she still possesses high enough intelligence to formulate plans and situations in reaction to the information given to her that actually work. Her weakness, on the other hand, is her attachment to families that lead her to outlandish and dangerous situations. Her particular attachment to Loid stems from her childhood abandonment and consequent governmental experimentation. Anya is aware she is only valuable because she has her gift, but she doesn’t share this with Loid in the fear that he will leave her, just as all the parental figures before him did.
Yor, as an assassin, is very powerful and through. Her physical prowess and keen awareness for people’s emotions help her at her job greatly. Her strong sense of justice and loyalty is what gets her to complete her commissions in scary accuracy. She also shows the same level of commitment to be a traditional housewife (that schoolmaster’s words cut deep). However, her biggest flaw is that blind sense of loyalty she has towards Yuri, Loid, and Anya. As the sole caretaker of a young boy when she was a young girl herself, it makes sense that she would develop a complex for taking care of others to the best of her abilities. However, she has no perception of her own limits, which can be dangerous for Anya and Loid if situations stem out of control.
Loid, perfect in any role he needs to be in, is a man who’s potential is limitless. Franky and his other spy comrades all know he is a man who can get any job done. Cold, ruthless, man of a thousand faces. His blindsight, strangely, became this identity he built that he should be ready to discard at a moment’s notice. It can be argued that many spies become too immersed in their role, however we have been told that Twilight is unique compared to other spies because of his ability to separate himself from his missions. I bet no one, not even Twilight himself, expected to play a role that suits his most authentic self, to the point where the line between him and his missions blur. His personal weakness…is himself. Or more accurately what he truly desires. He wants his friends and family to live safe and carefree lives, and he would to anything to ensure that happens. Most importantly, he wants the gilded version of peace he is living in right now. Taking his child to school, going to work as an upstanding citizen, and having a wife who’s morals and personality aligns with his. After so long of war torn streets and violent struggles to survive, he wants a home to come back to every night.
The common denominator between the three of them is family. They all would go through insane lengths for each other because circumstances lined each of them together perfectly. They fight for normalcy and steadiness. A life without unwanted surprises. This is not only a character weakness, but also an unchecked flaw into each of their goals as well. What will Twilight do when he is forced to choose between Operation Strix and his pretend family? What will Anya do when her secret is revealed, or if her birth family shows up in the picture in some way? What will Yor do when she is also forced to choose between her role as an assassin and protecting her loved ones? What matters more: the safety of the world or this small eccentric chosen family the three of them built together?