I really like that take on Teru and Shimazaki (also helps that I just rewatched that ep yesterday and it's fresh in my mind)
Do you think Shimazaki could also have development like Teru? And Teru also had a bad home life that led him to thinking he was the best (my hc/take is that he gaslit himself into thinking he was the Mc because it gave his suffering meaning. He was going through trials or tests in his story ig. Poor kid was left alone with no family or real friends or support system + a terrorist group on his back) do you think Shimazaki had something happen to him like that or it's just because the power got to his head?
OMG HI HELLO IM SO GLAD THAT YOU ASKED THANK YOU!!! IM ALWAYS HAPPY TO YAP ABOUT THEM!
"Do you think Shimazaki could also have development like Teru?"
He has all the right qualities, but i think his development would go in a slightly different way.
You see, as i have already mentioned, him and Teruki are as similiar as they are different and both can learn something important from each other.
The thing is : Shimazaki's development can't go like Teruki's, because he has no one to look up (heh) to like Teru does with Mob. And, let's be honest, he doesn't really need it.
Looking at Teruki for a moment, even if he looks up to Mob, he, unlike Mob, has no mentorship. He is comepletely alone on his jorney of figuring out both his emotions and his powers.
In other words : while Mob needs a psychologist, Teruki needs a coach, someone more experienced and strong.
And i think that Shimazaki would have fit this role just fine.
He searches for entertainment and getting on Teruki's nerves sounds fun even for me. Shimazaki even joined the Claw only because it sounded like fun, so why not mentoring a child for the sake of a hobby?
And THATS where he would has gotten get his character development from.
Just like teachers at school learn something new from their students and improve their own knowledge on the matter, by passing on his experience to the child, Shimazaki could learn something from Teruki that he himself lacks of.
Moreover, Teruki doesn't need someone who will just tell him things (like Arataka does to Mob), he needs someone who will CHALLENGE him, make him go wild and push far beyond his own limits.
exactly what Shimazaki did during their fight.
These thoughts are dictated by my hunger for a specific dynamic between him and Teruki, but i still think it could work.
"Do you think Shimazaki had something happen to him like that or it's just because the power got to his head?"
I don't think that powers got to his head. Unlike Teruki, who was convinced that he is the brightest star in the sky, Shimazaki looks at himself quite rationally.
Yes, he says that after the boss he is in second place, but is he wrong?
Also, while the entire 7-th devision of the Claw spoke in all seriousness about world domination, Shimazaki was here for shits and giggles.
So no, he isn't blinded by his own powers in my opinion, his ass is just blind.
As to second point... Yes, i think might be the case.
Well, at the end there is a MASSIVE headcanon of mine, but let's start from here:
I couldn't find any information about whether Shimazaki was blind from birth or how he lost his sight in the first place, so i began to speculate.
At first, let's look at his main ability.
Considering the fact that powers come from emotions, what kind of emotions does one need to experience, to make every single atom in their body disappear and re-appear somewhere else?
Also i want to point out that "prediction" of his opponent's attacks isn't one of his psychic powers as long as i know. Because surprise attacks do work on him.
From this, I conclude that this is a SKILL. And skill, as everyone knows, comes with EXPERIENCE.
How often does a person have to be punched in the face in order to start reading any opponent without even seeing him?
Hellova a lot i would say.
No idea. Bit i think it has something to do with his eyes.
Anyway, my hc is that he was a child, who had been born with psychic powers and probably had not-so-great childhood.
He has lost not just his sight, but his EYES at the relatively young age ( you know, the time when emotions are especially on the high level), had to break the usual way of life at the brightest moment of it, feel vulnerable 24/7 (because you can't just close your eyes and perform daily tasks as if nothing had happened i dare you) suffer a long period of adaptation to a new way of life, the possible absence of someone who could take care of him, make him feel safe as any child deserves to feel
all of this eventually led to the accumulation of a huge amount of emotions, the desire to escape, to disappear.
And at some point, he did.
His psychic abilities changed under the weight of his emotions and he gained one of the rarest abilities: teleportation.
The ability to acquire which a person must literally decompose himself into atoms and make them disappear. But at the same time, the ability that no one will ever be able to hurt, restrain, or control you again.
Also, i really liked your headcanon! It suits him. He and Shimazaki could have had a completely different level of mutual understanding!