In the end, Cecil had to keep the feather on the inside of her shirt.
If she kept it anywhere that Xue was able to see, his handsome face would scrunch up in displeasure. Moreover, with Hana pointing it out whenever she saw it, saying it was the gift K'xug was referring to and marvelling at its beauty, she wasn't helping with the situation.
She had a feeling that if Xue continued glaring at it, the feather would burn into flames. If she were to be more specific, it would be burnt away by his special flames.
The crew had to spend the rest of the days relaxing in this town, awaiting the completion of the repairs on their ship. Whether it was training, shopping, chatting or dining, they did it all.
Whereas, Masaru was dealing with the aftermath and the "death" of the leader of this town. Many mourned for the death of their beloved leader, and the rest who knew the truth behind Rugi's existence, could only join in the mourning with conflicted expressions.