Newton didn't waste time looking back when he heard the director's question.
Vicente answered the obvious. "No. For that, I'd have to reveal my identity. But that's something I'm not interested in doing, seniors. I hope you understand."
Vicente could have easily hidden from them by dropping his mask and using his real identity. But he hadn't, which indicated he either wanted to be found when he entered Ironcrest or had hidden intentions to protect his identity.
Either way, he would protect his identity with everything he had and not reveal himself so easily to these people.
Newton saw this when Vicente entered the office and didn't waste his time trying to force the young man to show his face.
However, the others there, especially those sent from the kingdom's magic college, didn't like his behavior.