Sachiko Tokisada

14-year-old girl who stows away on the Lady Whisker to gain Ahab's assistance in saving her planet Moad from the Federation and their ultimate weapon Moby Dick.

Upon being discovered by the crew, Lucky begs to join them as a whale hunter, following a test in which Lucky had to retrieve a coin at the bottom of a well filled with water (which had been filled with a liquid that makes a person sink not float), Lucky was saved by Ahab but managed to retrieve the coin. Having proven herself, Lucky becomes an Apprentice Whale Hunter under Atre's supervision, and soon earns the respect of the other crew members including captain Ahab.

Brave and resourceful, Lucky quickly settles into life onboard Lady Whisker, while still hiding the fact that she was a girl. After being found out however she begs Ahab to save her planet from the Federation which Ahab accepts upon learning that Moby Dick is involved.