Rider invoked Blood Fort Andromeda despite Sakura being in the school. If the barrier was sustained, would Rider have went to save Sakura even if it meant disobeying Wakame [Seaweed, Shinji's nickname]? <Teacher Blossom>
Takeuchi: I'm actually wondering about that too.
Nasu: I hate to be mean, but Sakura has enough magical energy such that she would only be in a coma. To Rider that's not a problem, which is why it was done in secret from Sakura. Had she talked to Sakura instead, it would have become much more chaotic like "stop her brother → her brother becomes more of a Wakame."