Since they were young, Lory and Lucas were not only taught how to fight and defend themselves but also how to be the leader of the country but since the future king was Lucas, the pressure on Lory wasn't as much as Lucas after all Lory's main job was as a supporter and frankly, they didn't want to make her life any harder than it already was.
Because of that it never crossed her mind that one day she would replace Lucas's position as the temporary leader of the kingdom. To make matters worse, Lory has already gotten used to being spoiled by Zhao Li Xin, yes, she might help Hei Shen's problems here and there, but it is not mandatory besides the four King's Palace do not want to bother Lory too much as well.
As a result, Lory becomes nervous when Fargo asks her to replace Lucas, but she understands there is no other way because, besides Lucas, she is the last royal blood in the kingdom.