Although Yin Xi's actions did indeed cause some trouble for XIG, it wasn't much. After all, nobody else knew that Yin Xi was that dark Ultra Warrior. How could anyone possibly connect a dark Ultraman with XIG?
The three of them stayed in the Gaia universe for only a few days. During that time, a few Propagators of Ruin emerged, but Yin Xi wiped them out effortlessly, directly scaring the Radical Destruction Bringer so much that it dared not make another move.
Upon returning to the Tiga universe, Yin Xi settled Lisa in the private seaside villa belonging to him and Camilla. The effects of what he had done would not be visible for a short time, so he quietly waited on Earth.
Chapter 106