Diona in Assassin's Creed Odyssey is the deceptive twin sister priestess involved in a key questline on Kythera Island.

Players often face confusion distinguishing her from her identical twin, Eritha, the high priestess of Aphrodite, during the climactic confrontation at the Altar of Aphrodite.

Quest Background

Diona first appears in the side quest "I, Diona," where Kassandra (or Alexios) rescues her from bandits at the Shrine of Fates in Skandeia Bay. Posing as a victim of the Cult of Kosmos, she manipulates the misthios into completing tasks like freeing mercenaries, retrieving poison, and eliminating a captain to aid her coup against Eritha. This storyline unfolds in the 420s BCE, tying into the Worshippers of the Bloodline branch of the Cult.

The quest requires completing "Athens' Last Hope" beforehand, with a recommended level of 35 or higher. Diona's romance option emerges if players flirt during interactions, leading to a potential intimate encounter after her quests.

Identifying Diona

Reddit forum tip (2024): "Listening to their ways of speaking, the soft, manipulative one is Diona. The arch priestess [Eritha] is more aggressive."

  • Diona's traits: Soft-spoken, cunning, seductive; uses deception to trick players into killing Eritha initially.
  • Eritha's traits: Direct, authoritative; genuinely serves Aphrodite and Kythera.
  • Key reveal: Kassandra uncovers their twin status late in the quest, seeing through Diona's final lie—prompting combat where Diona is killed.

If you pick wrong in the dialogue choice mimicking voices or doors, you might kill Eritha by mistake, altering outcomes.

Player Discussions & Trending Context

Recent Reddit threads (as of late 2024 into 2025) revive this puzzle, with users sharing screenshots of the twins and debating voice lines. One post titled "Which one is Diona" garnered tips on her "manipulative" demeanor. No major patches changed this since launch, but speedrunners and NG+ players reference it often.

In January 2026, with Assassin's Creed Shadows out, Odyssey nostalgia spikes in forums—Diona remains a fan-favorite for her twisty reveal and romance arc.

Character| Role| Personality| Fate
---|---|---|---
Diona 1| Traitorous twin, Cult member| Manipulative, ambitious| Killed by Kassandra
Eritha 1| High Priestess of Aphrodite| Protective, stern| Spared if Diona targeted correctly

TL;DR: Diona is the scheming, softer-voiced twin—not the aggressive high priestess. Listen for manipulation in dialogue to spot her.

Information gathered from public forums or data available on the internet and portrayed here.