Relationship between Keyleth and Percy

Keyleth and Percy have a strong bond of friendship, despite the fact that the human is, in Keyleth's own words, her "total opposite". Occasionally, she serves as a moral compass to him, especially during the Whitestone story arc. She helped Percy create his Diplomacy gauntlet.

As the characters matured and emerged from life-changing events, they began disagreeing more frequently on matters of diplomacy and leadership. Keyleth had become very concerned with Percy's morality, pointing out that he had a history of making terrible deals with dangerous partners, while Percy thought Keyleth came off as being snobbish. However, around the time Vox Machina liberated Westruun from the Herd of Storms and Umbrasyl, the two of them patched things up, with both of them better understanding how the other thinks.

When Percy died, Keyleth was devastated and contributed to the slaying of his killer, Anna Ripley. When he was brought to Whitestone for a resurrection ritual, she deduced that the shadow demon Orthax was still bound to Ripley's weapon, Animus, and thereby blocking the ritual. Keyleth used Greater Restoration to sever the connection between the weapon and Orthax, freeing Percy's soul and giving Pike the opportunity to commence. During the ritual, Keyleth did what she could to convince him to return to the Material Plane, calling him her best friend.