Xila always thought "glorious sacrifice" was a stupid phrase. If you're dead, you're dead. Once you're buried in the ground, what glory is there to speak of?
It wasn't until he actually sacrificed himself and was brought back to life by his good brother Kaien that she decided this was even worse than a glorious sacrifice!
Where did this long hair come from? And where did my little brother go?
What's with this tail? And these wings?
Kaien said this was a resurrection item he'd found after going through untold hardships. It could not only bring someone back to life, but also let them customize their gender and race!
Since Xila was always complaining that she couldn't find a girlfriend, he had reluctantly changed her gender when resurrecting her, turning her into a dragon girl.
He said this might help her find true love. No need to thank him, it was what a good brother should do.
Xila told him to get lost, as far away as possible.
As for what happened afterward...
Xila poked her true love with her tail. Kaien said, "Quit fooling around. We're busy!"