Thanks for the chapter!
That is one cold blooded princess. LN gives more details but essentially her mother was a devout believer in the goddess but died when the demons invaded Elyushion. Taking it really badly she wants to eradicate all the demons for killing her mother, destroy faith in the goddess for not answering her mother's prayers, and kill all the leaders and countries that could've helped her mother but didn't. Hence she is willing to do anything to accomplish her goals even if it means turning on her friends and family or doing horrible things to her subjects. Such as the inhumane human experiments on that adventurer in the guy's lab.
Btw, in the LN find out that it was three guys not four, with MC being one of them, who destroyed all his items in a game as punishment for MPvP(?) Not sure if MPvP is right term but basically he grabbed the aggro (monsters focus on him and will charge/attack him first over anything else in area,) of a whole bunch of monsters forming a monster train, led them towards MC and his two veteran buddies before using an item to conceal himself leaving a whole bunch of angry monsters who lost him and turned their attention towards the other three. Idea was the monsters would kill them resulting in some of their items being dropped, then return to their original location while Tomoki still using stealth item to hide from monsters goes over and grabs the high quality items for little effort. However, the two vets not only were able to defeat the monsters but saw through Tomoki's plan so using some special abilities captured and killed him over and over so he'd drop all his items and watch as they disappeared as punishment for using despicable means to get items at other players' expense. Due to the two vets special abilities and special rules of the map they were in Tomoki couldn't escape or log out and had to watch all his items get dropped and time out.