For some time now, My Hero Academia has shown that All for One has managed to dig deeper and deeper into Tomura Shigaraki’s mind, not just as a mentor and teacher, but as a personality. Due to the supervillain quirk that Tenko Shimura’s situation has radically changed.
An important test was found in comparison with Star and Stripe, the heroine capable of manipulating reality with simple but targeted commands. However, we saw in a mini-arc of My Hero Academia that the Quirk was not omnipotent and it was necessary to know the opponent’s identity well, and it was this non-trivial element that fooled Star and Stripe. Now Shigaraki is not just himself.
In order to On Shigaraki, the Shinso quirk would no longer work? Remember that the Brainwash quirk is triggered when the opponent answers a question from Shinso. So unlocking doesn’t require the person’s name to be named, as was the case with the Star and Stripes quirk. From this vantage point, power could function.
However, it is also necessary for Shinso to want to apply his Quirk to that person. Therefore, in one of its facets, it is possible that Shigaraki can withstand the Force for Shinso would not know which of his opponent’s many personalities was fighting At this moment. If that detail really had any value, then Shigaraki would be virtually immune to Shinso’s control. Otherwise, it would suffer the consequences like everyone else.
Given the ongoing war, is it possible that the two will eventually meet? It is not said, but it cannot be ruled out either. At that point we will know if there is really an effect or not.