Kan and Thua are the story of what it feels like to be an observer in your own life, to watch yourself fuck up again and again and wonder if you can ever, ever, do anything right.
Thua stands by and watches the world rage and his stepfather yell and people suffer and he stands to the side because he's so sure his voice is useless, worthless, and so he stays silent because speaking up does nothing.
Kan tries to pretend he isn't queer and jokes about girls and flirts madly and hides the way he stares after Thua and aches inside each time he hesitates and wants to be a hero but cannot even begin to handle the judgement he knows will come.
They are both the story of what happens when the world has told you that are you not who you should be and so you either shut down or you pretend to be who they want you to be and either way you just keep hurting yourself, beating yourself against the expectations that you can never fulfill.
Kan is trying to fit a hundred year old mold of a man that can never be replicated and Thua is wondering if disappearing is easier than living.
Kan creates a secret identity to try to comfort the only true person in his life because Thua reached out in desperation to the clouds in the sky and he could not stay silent but he also could not find the courage to be himself at the same time.
Thua shown a light at the sky in the day and he did not get a hero but the secret that the hero keeps, the side of the hero that is hurt and scared, the side that the hero must hide. He did not get a hero because the hero has always been following him but cannot help him.
Kan is constantly trying to connect to Thua as his hero but he is realizing that he cannot be the hero Thua deserves.
But he can be a secret. He can be a comfort. He can be a whisper and a cloud and he can try to keep the friend he loves but cannot love in his life, at his side, as happy as he can be.
When Kan, Akk and Wat talk about the school alone they talk about the freedom that will come when they're done, the people they will be able to be when this is over and they are no longer part of this larger whole.
Kan looks at Thua and he wonders if that freedom will ever truly come.