The so-called "entering the castle" refers to the common term for entering Edo Castle, where the Shogunate resides.
Due to his low status, Aoto had never entered Edo Castle, which is similar in stature to the Forbidden City of the Tang Dynasty.
"Personally, I believe this is a very positive sign."
"It indicates that Duke Dashu might be interested in you for accomplishing a remarkable feat and wants to see you in person."
"If Duke Dashu really calls you into Edo Castle for this reason, then your sudden promotion makes sense."
"Being highly appreciated by those in power and rising swiftly... there's a precedent for that currently in the Shogunate."
"Who?" Aoto instinctively asked.
Arima smiled faintly:
"Lord Katsu, whom you saved earlier, Mr. Tachibana. He was merely from a lower-level Hatamoto background and is now nearly promoted to a new Warship Magistrate."
