The abilities resides in the body.. If you turned into soul you lose your abilities.. That's literally what happen to Nirasawa and Ririka.. Just re-read the manga again.. They can't do shit.. Maybe they can talk with someone who had soul abilities like the telepath girl or the MC but they are just soul..
When they put in the different body they will lose the previous power and had to use the power that resides in the body.. like Yamada and Akemi..
His ability is actually overpower.. But it resides in that body.. If the your theory is true I don't think he can get it back unless whoever resides in that body move him in..
And then again if he is not really the real owner of the body why he can't remember it? Did that soul just lost his original memory? But Yamada and Akemi still maintain their memories tough..
I get that, but we don't have all the rules yet then what we know as you just stated (and I DID know that fact when I made my theory by the way!) For all we know MC could BREAK those rules! His power is VERY strange by the worlds Rule standard! And you said it, it's in the BODY not the SOUL! But who's to say if THIS isn't the MC the other one COULD still use CERTAIN abilities! And Writers have usually added TWISTS where their villain and Hero are usually the RULE BREAKER who chews up the ESTABLISHED rules and spits it out like used gum by being EXCEPTIONS or something that ESCAPED the reality of the rules!
I mean as I said, the Delinquent explained how they (Government) "assessed" skills in this world and HOW they are assigned! But it feels ALOT like it's a case of "on PAPER" and if they did that, if I remember, not ALL of MC's Stepsister's skills are KNOWN! she's considered UNIQUE for having THREE different skills when everyone has one! I know their not blood related, but something in me is VERY curious on her AND MC in general! Note the dream he had about him and her meeting, growing up and then her crying over his father's corpse as she looks at him with the DEFAULT look of hate she's been GIVING HIM since the start of the story that she even has it in the TITLE PAGE! Somethings Up! I might CHANGE my theories, but the one you're replying to is worth keeping on your STICK NOTE BOARD in your head till anything later DEBUNKS it 100%. I mean MC ONLY knows what he's been TOLD about his ability, the whole POSSESSION was a "Happy accidental find out!" and his sister from what the Cronies of her's made mention seems to be ADAMENT about him being ISOLATED as in NO associates PERIOD! Bullies she'll ignore to an extend, but ASSOCIATES in a FRIENDLY manner, that seems to be a NO-NO! It might make sense because his death IS going to be made out to be an ACCIDENT and she's not even HIDING IT from him that this is going to be the LIKELY outcome of how his death will be covered up! And there seems to be MORE on his ISOLATION (I get that most won't associate in FEAR of pissing his A Class Sister and her Cronies who don't HIDE their shared hatred towards him so stay away from him! But no one PERIOD is weird, especially as Deliquent girl was the ONLY associate he had in that she targeted him! But why isn't SHE on the chopping block then!) And they WANT to keep it a secret from his sister cause she had a BAD reaction before to someone Associating with him. So I have to wonder WHAT that event was, and specifically you'd think MC would have been CAREFUL having the girls near him (their bodies) if this was true, yet they ONLY reacted and are acting when they got info the Second Girl was hanging around him. Which it hasn't been THAT LONG so how they knew is a mystery that will likely be explained later
I mean I could be wrong, and I'm keep it a THEORY and wondering HOW MANY PERCENTAGES of what I put forward is wrong or right! I've seen a few stories with the MC going through the story THINKING their the original owner of their body till we get a Total Recall situation where the big bad turned out to be THEMSELVES or specifically the ORIGINAL owner of their body. Hell I put forward a Theory that the OG owner of MC body MIGHT be possessing his Sister for all we know using ANOTHER method besides the "fuck em to get them possessed" method! It may not be THE ONLY method to get other POSSESSED. The Sex and Climax I mean! Maybe ONE! MC is STILL learning the in's and outs of his ability! Hell the Second Girl was all about PERFECTING the art of it for future use, and the PRINCE is considered cause her ability would make it EASIER to get the CLIMAX result (only held on HOLD because she's in the same class as his sister and her crones and messing with Ms. Prince MIGHT attract their attention! MC IS on a TIGHT timelimit before he "Graduates" soon and Sister FUFILLS her PROMISE to end him! So he HAS to take chances, but not if they lead to an INSTANT game over as HE doesn't fully know WHY she wants to kill him beyond GUESSES and specifically WHY after he graduates! Only WE are privy to the fact that the reason for the delay is because she's under suspicion of kill his father, her stepfather and killing him BEFORE that time while he's under the government's CRAPPY protection might bring them down on her! With her power set, why shoud
Sorry if I got Ranty! I just wanted to TRY and explain my reasoning best I can! But I AM making these KNOWING what I know currently (I got no spoilers to follow, I REALLY WISH I did as the WAIT for new chapters and MORE is KILLING ME!)