This line. This line frickin killed me.
Because Star is not done with her training. Even if she is, Moon knows how important Earth is to Star and would of course allow her to return, even if it was just to visit.
So that means Star is expecting one of two outcomes: either Moon is going to die in battle and Star will be made queen earlier than expected
Or Star is going to die in battle, without ever seeing the people and planet she had come to love ever again.
This girl’s gearing up for the ultimate showdown, and she had to tell Marco how she truly felt before she did