#which sucks because I really love that tachihara is happy in the port mafia

[walmart-miku]

Thou Shalt Not Die Ability Analysis

Ok people, the brain rot won't leave so I'm making it everyone's problem now.

I have 2 theories about how Yosano's ability, Thou Shalt Not Die works and has changed.

So we know from Yosano's backstory that she didn't always have to half-kill people or have them fatally injured. We see her heal perfectly "fine" people who aren't on the verge of death but are injured badly enough to warrant taking them out of the fight. This means that the way her ability originally functioned was ideal and really quite amazing because she could heal anything without requirements attached to her ability.

So when did the change of Yosano can heal anything, big or small, to, Yosano can only heal fatal injuries?

I think it happened here, in this scene where Mori shoot Tachihara's brother to get Yosano to heal him.

Why do I think it happened here? Well at this point Yosano has been run to exhaustion and she's seen a lot of "death" at this point without having actually seen death. I think her watching Mori "kill" someone to make her heal changed something about how her ability functions. This first theory is mainly based off of the theory that trauma is where abilities stem from and can therefore change them. In addition, Yosano says that she wants to save the lives in front of her. She's placing the condition that she must be saving a life for her ability to work here and Mori is solidifying it by almost killing Tachihara's brother.

2. Yosano simply chooses not to heal someone if they aren't severely injured. This is either done subconsciously or consciously.

Subconsciously is likely the result of her working as a doctor in the Great War, because again, Yosano has seen so much during the war. It's likely that she can not bring herself to heal small injuries again after watching Tachihara's brother die. I also believe that it might be her way of minimizing her "correctness" (this is in reference to the fact that Tachihara's brother tells Yosano before he dies that she is "too right/just/correct" depending on the translation) and her way of coping with what happened to her.

Consciously, I feel like is less likely but still possible. If Yosano is the one to seriously injure and maim the patient, then she is in full control. She knows how close to death they are, their mental state, and how best to heal them. This also prevents people from coming to her for injuries, once again minimizing her "correctness". This also allows Yosano to prevent what happened to Tachihara's brother from happening again.

All in all I think that Yosano is just absolutely fascinating and we really don't see any other abilities in BSD that did what Yosano's did.