In the ever-evolving endgame landscape of Honkai: Star Rail, the Memory of Chaos domain remains the definitive proving ground for team compositions and character strength. As of 2026, the meta has crystallized around a core group of elite characters, with usage statistics revealing clear frontrunners. The domain's cyclical nature, resetting with new enemy lineups, demands constant adaptation, making the popularity of these units a direct testament to their overwhelming power and versatility in overcoming the game's toughest challenges.
Dominating the rankings with an astonishing 90.4% usage rate is the Galaxy Ranger, Acheron. Since her debut, she has firmly held her position as arguably the premier DPS unit in the entire game. Her unique kit, which focuses on applying and then detonating multiple debuffs on enemies for devastating Lightning damage, revolutionized the damage-dealing paradigm. To unlock her full, terrifying potential, players strategically pair her with top-tier support characters like Pela or Sparkle, who can enable her debuff-centric playstyle.
The silver medalist, with a formidable 88.1% pick rate, is the master strategist of the Ten Stonehearts, Aventurine. Released in the same update cycle as Acheron, Aventurine's value lies in his unparalleled defensive flexibility. His powerful shielding capabilities are not tied to a specific element or team archetype, allowing him to slot seamlessly into almost any composition that requires robust protection. This adaptability has made him a cornerstone of modern team-building.
Interestingly, Aventurine exhibits exceptional synergy with the third-place character, the genius researcher Ruan Mei (85.9%). Ruan Mei stands as one of the most potent support units available. Her skill provides the entire team with a massive 50% Weakness Break efficiency boost and significant damage amplification based on her trace levels. She is particularly devastating in teams that specialize in Damage-over-Time (DoT) effects, as her ability to delay enemy recovery from Break status extends the window for these ticks to wreak havoc. The combination of Aventurine's unbreakable defense and Ruan Mei's offensive support creates a nearly impenetrable and high-damage core.
The current top 10 most used characters in Memory of Chaos are:
| Rank | Character | Usage Rate | Primary Role |
|---|---|---|---|
| 1 | Acheron | 90.4% | Main DPS (Lightning/Nihility) |
| 2 | Aventurine | 88.1% | Shielder/Defense (Imaginary/Preservation) |
| 3 | Ruan Mei | 85.9% | Support/Break (Ice/Harmony) |
| 4 | Boothill | 85.6% | Main DPS (Physical/Hunt) |
| 5 | Huohuo | 72.2% | Healer/Support (Wind/Abundance) |
| 6 | Fu Xuan | 69.7% | Damage Mitigator (Quantum/Preservation) |
| 7 | Black Swan | 68.6% | DoT DPS (Wind/Nihility) |
| 8 | Sparkle | 67.7% | Buffer/Support (Quantum/Harmony) |
| 9 | Robin | 62.7% | Support (Physical/Harmony) |
| 10 | Kafka | 61.0% | DoT Enabler (Lightning/Nihility) |
Securing the fourth spot is the cyborg cowboy, Boothill (85.6%), a character who has maintained remarkable relevance. He is celebrated as a powerful and independent DPS unit, capable of fitting into many different party types without demanding highly specialized supports. His self-sufficient nature and high single-target damage make him a reliable choice for tackling the formidable elite enemies and bosses that populate the Memory of Chaos stages.
The list then diversifies into other essential roles. The vivacious exorcist Huohuo (72.2%) provides crucial healing and energy regeneration, while the master diviner Fu Xuan (69.7%) offers unique team-wide damage redirection and critical rate buffs. DoT specialists like Black Swan (68.6%) and Kafka (61.0%) continue to enable powerful alternative team archetypes, and hyper-carries rely on premium buffers like Sparkle (67.7%) and Robin (62.7%) to reach their damage ceilings.
This tier list, derived from aggregated player data, paints a clear picture of the 2026 meta: teams are built around hyper-carry DPS units like Acheron, protected by versatile sustain options like Aventurine, and amplified by universal buffers like Ruan Mei. The enduring presence of these characters, even years after their initial releases, speaks volumes about their foundational design and the lasting power of a well-crafted kit in the face of Honkai: Star Rail's most punishing content. Success in Memory of Chaos is less about chasing every new release and more about strategically investing in these proven, meta-defining pillars.