Traveling through various planes, using the identity obtained to induce the sister in the current plane to follow him willingly.
No matter what the identity is - a relative, a lover, or an old enemy.
But of course... The identity of the lover is the safest one. It is not unreasonable for the world to praise the craziness of love, and out of selfish motives, Jing Yueyi also wants to be with herself as a lover, openly and honestly, without Jing Baoer knowing.
Rather than in a vague way of getting along with each other, in an extremely frustrating way where he didn't dare to act rashly because he couldn't understand Jing Baoer's thoughts.
The only person she cared about in her life was Jing Baoer. Maybe she fell in love with her sister, or maybe she was just paranoid. But no matter what, she still hopes to be able to get along with each other in an open and aboveboard way, where both people have a fairly mature and independent understanding. It is very helpful for any of the above points. This is very clear.
But the only pity is that when she is in the plane, she has to enter in the same format as Jing Baoer. In other words, she will not keep her own memory and other things at all, but she will also be split into several soul fragments to attack Jing Baoer.