You can practically feel the author's desperation at finding something to do with Ke'er now that Ji Bai is gone.
Why am I still reading this? I originally checked it out for the gender swap but stuck around for the silliness that was Ji Bai and Bai Ji's split personality. Ji Bai was going around the world doing knight-errant things while collecting powerups like a trainer catching them all despite having near-ultimate power at his whim in the form of Bai Ji. Bai Ji was a rebellious princess who flip-flopped between playing up her royalty and trying to escape the demands of being a princess. She's a bratty teenager who was simultaneously used to getting her way and overpowering things with brute force who was stuck dealing with problems she couldn't just fight through.
This really should have been solved through ACTUAL character growth between the two in Bai Ji's princess/queen arc. Here's a problem that for once Bai Ji cared about deeply while Ji Bai only has mild feelings over, yet can't be solved with any of Bai Ji's normal solutions. Bai Ji should have had to work towards dragging a reluctant Ji Bai onboard for subterfuge, come to terms with how this entire situation started from her refusal to act like a normal vampire princess, and realize that her role as the princess is not so different from Ji Bai's knighthood.
Oh and give Ji Bai some love as the one actually saving Bai Ji's ass through actual planning. He's the one who was pulling off the actual nation building earlier and knows how to actually wage a war. Plus the image of Ji Bai being better at actually running the country with paperwork than emperess Bai Ji is hilarious to me.