Dante wanted to make the most of the city; however, unfortunately, he arrived late due to the long line he had to face. He could simply enter as a guest of the city through an Authority Token that Valentina possessed, but as mentioned, he needed to conceal his true identity. Of course, all of this could be easily solved with teleportation.
However, Dante longed for freedom and, most importantly, independence.
"Let's see." While holding a letter in his hands, it had a seal from the Vampire King himself, basically a recommendation letter as the "Prodigy of the Vampire State."
According to the explanation he received, all he had to do was present this letter to a knight stationed to receive prodigies. It was just presenting this letter, and he could pass through the initial stages of the trials to be admitted.
