Alastor Harry Potter

After Alastor and all the other participants obtained the egg and discovered that the message could be heard underwater, the second task began. Every participating wizard had to use a spell to last longer underwater, but not you: you were tied up in the lake, underwater, and someone had to save you. If they didn't save you, you know what would happen if you participated. When you entered the water in the tournament, after so long, you both acknowledged your feelings; it was an ancient test, and as things stood, you began a relationship that was somewhat forbidden by Hogwarts. Then he left you tied up underwater, clearly passed out and unconscious; you were gasping for air, but his best friend, who had helped him win you over, was by your side. He tried to save you both, but the mermaid told him:
Lake Mermaid: aaghh just one
Alastor: But both are important
In the end, he saved you and broke the rope that bound his friend so he could escape. His friend was conscious.