Quiz

After some thought, I came to the conclusion that it won't be possible to swim perpendicularly to the maniac's movement...
Most likely, the trajectory should be such that the tangent to it at any given moment passes through both heroes in this scenario (the girl will naturally be the point of tangency).;) An Archimedean spiral or something similar...

Added 1 minute ago

at least give explanations as to what this will lead to

This will lead to an increase in the distance traveled by the maniac.;)