Relationship between Percy and Vex'ahlia

Percy thinks Vex'ahlia's greed is endearing. Vex is very appreciative of Percy tricking her out with ammunition, Hawkeye-style. She even refrained from looting his family home. Since reclaiming his heritage, Percy has access to Whitestone's wealth again.

However, Percy and Vex's eagerness to loot Purvan Suul's sarcophagus led to Vex dying from a necrotic explosive trap. While Percy feels he owes Vex because he triggered the trap, Vex feels a sense of freedom now that she experienced death and understands how important it is to seize opportunities in this life.

After Vex stole Gern Blanston's Broom of Flying and fell from it, Percy began modifying it to add a strap so Vex doesn't separate from the broom when falling, as well as stabilizing leg grips to aid in her archery aim while flying.

Percy was the one that Vex allowed herself to drop her guard around when she told him about her upbringing and how it deeply affected her growing up, after which Percy did his best to reassure her. She then asked him to stay by her side when they would enter Syngorn. Percy later granted Vex a title, surprising her with it when he tried to raise her worthiness to her father, Syldor Vessar. The title granted was "Lady Vex'ahlia, Baroness of the Third House of Whitestone and Grand Mistress of the Grey Hunt".

In their search for Fenthras, Vex confessed that Percy was the first person that was always there for her other than her brother. When Percy was killed by Anna Ripley, Vex was the most devastated and dealt the final blow that ultimately took her life.

When Percy was brought to Whitestone so that Pike could resurrect him, she had found an unmarked letter that was later revealed to be a goodbye letter that he had written in the chance that he would not survive the coming days. It was during the ritual that she confessed that the day that they were in Syngorn was one of the happiest days of her life, and it was because of Whitestone and him. She went on to confess that she didn't want any of it if he wasn't there, and that both Whitestone still needed him and she still needed him by her side. With that, she leaned down and kissed him, and finally told him, "It's yours," an echo of what she had said to Sondur in the Feywild when she rejected his offer by saying, "My heart is someone else's." He was shortly resurrected afterward thanks to her efforts along with those of Pike and Keyleth.

After Vorugal was slain, Vex was encouraged by her brother to confess her feelings to Percy. The next day, she had a private talk with him, but could not bring herself to say anything about her feelings for him. As the conversation ended, Percy kissed her and walked away.