Everyone Can Read My Mind: The Aloof Senior Sister Takes on the Three Realms

[Mind reading + unhinged antics + everyone loves her + male rivals vying for her + 1v1, multiple love interests, both pure] Lu Ruan transmigrates into the worlds of three books. On the surface, she's a cool and aloof senior sister. In reality, she's the hardest-working workhorse in all three realms. The first book is a power fantasy about a dominant male lead. The protagonist is a Demon Venerable devoted to his career, with the sole goal of uniting the three realms. Lu Ruan's mission is, to put it nicely, to help him accomplish his grand ambition; to put it bluntly, she's his lackey, doing all the odd jobs. But... can anyone tell her how the dignified Demon Venerable turned into a clingy puppy? The second book is a melodramatic Mary Sue romance. After countless trials and tribulations, the hero and heroine finally end up together. Lu Ruan plays the wicked female side character who stirs up trouble. Wait, how does the heroine already have someone she likes before Lu Ruan has even had a chance to cause trouble? And isn't that person... her? The third book is a pure-love romance with two male leads. The first is an insanely powerful, fallen evil god; the second is an ethereal and noble immortal lord. Lu Ruan only has to sit back and enjoy the show, so how did the drama end up revolving around her? A lover turns into a rival? Wait, wait, wait! Why is there also a handsome man in a jade pendant? And a merman prince? Why are they all making moves on her?