What the Tournament Committee and the Durmstrang students feared did not happen. Corvinus did not abandon his close friend to rescue Hermione.
It was not that he did not want to, but that Krum arrived just in time.
Krum had been among the leaders from the start, but although his direction had been more or less correct all along, he had not been as certain as the other three groups. He had made several small course corrections along the way, only settling firmly on his direction when he heard the Fish-Folk singing very close to Merpeople Village.
As soon as he arrived, he saw from a distance that Meng, who had already rescued her younger sister, was urging Corvinus to leave his friend and rescue Hermione.
Krum did not know what the two had been discussing earlier, but one look at the situation before him, followed by the people in the cages, immediately told him which treasure he needed to rescue.
So, without bothering about anything else, he went straight to Hermione's cage and began figuring out how to deal with it.
Corvinus had been wavering in the first place. He was the rather well-behaved type, unlike Meng, who never worried about trouble getting out of hand and only worried that there might not be enough excitement. So even with Meng urging him on beside him, he had still hesitated.
Then Krum arrived.
There was no need to hesitate anymore. He could turn around and rescue his own friend. At that moment, Corvinus suddenly felt a little regret.
Corvinus and Meng both seemed highly accomplished in magic. Both could use the Sword Beam Charm, though neither looked as relaxed on the Viewing Screen as Harry—Harry had looked positively unrestrained while cutting through the cage with the Sword Beam Charm, but