Relationship between Percy and Vex'ahlia

Back when the group that would later become Vox Machina sought to save Grog from being a lich's phylactery, Vex'ahlia first met Percy in a dark prison cell, the gunslinger having been imprisoned after he had tried and failed to kill Anna Ripley. Since then, the two had established a rapport, including Percy giving all of his money to her from the day they first met. Percy would later think of Vex's greed as endearing.

From time to time, Percy was eager to create custom ammunition for Vex, Hawkeye-style, such as when he made her a grappling hook arrow and three exploding arrows. The results of the tinkering earned him a kiss from the ranger.

When Percy revealed his past to the group about the Briarwoods, Vex was among the first to show her support in helping him deal with the villainous power couple. When in Whitestone, after killing Kerrion Stonefell, she gave Percy a peck on the cheek, assuring him that he wouldn't have to face his darkness alone. Despite the temptation, Vex refrained from looting his family home, and after Percy had killed Professor Anders, she reached out to him out of concern. When they fought the Briarwoods at the Ziggurat, and Vex had plummeted to the ground after nearly getting killed by Lady Briarwood's Finger of Death spell, Percy shot off her arm in retribution—rendering Delilah unconscious—and jumped down to help save the ranger. And when Percy was fighting the temptations of Orthax, Vex begged for Percy to fight the monster inside him.

Percy and Vex developed a friendly yet flirtatious relationship during their time together which led to moments such as purchasing black powder from Victor. Percy had to convince Vex to give him the money needed with a promise to make her something nice. However, Percy and Vex's eagerness to loot Purvan Suul's sarcophagus led to Vex dying from a necrotic explosive trap.. Percy felt immense guilt for his negligence and had to apologize profusely to her twin brother Vax'ildan as well as Vex herself. But while Percy felt he owed Vex because he triggered the trap, Vex felt a sense of freedom after experiencing death, understanding how important it was to seize opportunities in life.

After Vex stole Gern Blanston's Broom of Flying and fell from it, Percy began modifying it to add a strap so Vex wouldn't end up separated from the broom when falling, as well as stabilizing leg grips to aid in her archery aim while flying. He eventually finished his customization of the broom before they departed for the Feywild, renaming it Death from Above.

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".

During their search for Fenthras, Vex confessed that Percy was the first person that was always there for her other than Vax. It was around this time that she began to develop genuine feelings for the gunslinger, as proven when she was tempted by Saundor with the promise of power in exchange for her heart. She ultimately refused the archfey's offer with the words, "My heart is someone else's."

When Percy was killed by Ripley, Vex was the most devastated and dealt the final blow that ultimately took the doctor's life. When Percy was brought to Whitestone so that Pike could resurrect him, Vex 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 Vex finally confessed her feelings for Percy, unsure whether or not he heard her, and sealed it with a kiss. 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.