How to beat Siren, the first Axon? Clair Obscur: Expedition 33

Mermaid is the first Axon to face in Clair Obscur: Expedition 33, available starting’Act II after defeating Renoir.

The Keeper sends you to collect energy from two Axons to destroy the dome protecting the Painteress. To defeat them, rely on attacks of the Ice. We'll tell you everything!

Where is Sirène?

The temple of Mermaid is located on an island in the Northeast of the map. It's a very large island with a massive temple—you can't miss it. On the map below, it's marked by the red circle, all the way to Northern part of the open world.

What are Siren's combat mechanics?

The core mechanism of this boss is based on the charm : Your characters become confused and attack their own allies. Note that before facing Mermaid, you must first defeat Glissando.

The battle takes place in three phases, announced by a message on the screen: «Sirène’s dance becomes frenzied,» then «The Final Act begins» when her HP is very low.

Explanatory video in French by Alucare, ideal complement to the page. View video (you can use YouTube's automatic translation)

Start of the fight

• Mermaid Attack your entire team with a combo 2 shots with its Glissandos.
• A ballerina may pose the charm about one of your characters.

Phase 2: «The Siren’s dance becomes frenzied»

• 5 ballerinas join Sirène and strike your entire team, each with a different element, that is, a sequence of 5 shots in a row.
• Sirène then seduces one of your characters, and then triggers a Gradient attack particularly heavy.

Phase 3: «The Final Act Begins»

• Glissando returns to assist Sirène. Together, they attack the entire team: first, avoidable jumping blow, followed by a siren blast.
• They repeat this pattern 2 times, before one last slow attack from Sirène to the entire team.

Tips for beating Sirène?

Recommended ingredients: Maelle and/or Sciel and/or Verso in DPS, with Lune to support healing. This build addresses both high damage output and survivability—the two key aspects of combat.

Get ready before the fight

Before entering the temple, pick up the picto Anti-Charm by defeating the Weaver. You only have one copy, so equip it on a character and win 4 matches with him to control his Lumina. You can then activate Anti-Charm using Lumina on the other two (this costs Lumina points): the threat is neutralized for the entire team.

Next, think about your weapons. Sirène has a weakness against the Ice element, then the team from Weapons of Ice at Maelle and Verso. Their abilities utilize the element of the equipped weapon, which maximizes damage on the boss.

During the battle

• Sciel deals heavy damage from’Obscure element, which are very effective against Sirène.
• When the Final Act begins, the arena goes dark and the entire team is struck by a curse that kills them after a few turns (4, according to our sources). Use the Moonlight Healing ability to remove it in time.

With the’Anti-Charm asset, the Ice on offense and Lune When it comes to care, you're in control from start to finish.

To get a better handle on each character on your team, check out the Character Guide on the Clair Obscur: Expedition 33 Wiki.

What are the rewards of defeating Siren?

Beat this Axon earns you three tangible rewards:

• The weapon Tisseron to Sciel.
• A picto Energy - Tower.
• The 3 Resplendent chroma catalysts help improve your characters' chroma, a significant benefit in the midst of the expedition.

To keep making progress, find all the bosss in the Guide to the boss on the Clair Obscur Wiki: Expedition 33.