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Sandrone

Sandrone

Mirrored Analysis

Ice IceClaymoreFatui Jun 30, 2026

The Seventh of the Fatui Harbingers, "Marionette." Interprets all phenomena through the prism of mathematics, and is an elegant lady who is never absent from a tea party.

Profile

90

Base HP

13226

Base ATK

342

Base DEF

752

CRIT Rate

19.2%

ElementIce Ice
WeaponClaymore
ConstellationNarcissorolegium
AffiliationFatui
Birthday1/13
CV (EN)Deneen Melody
CV (CHS)洪海天
CV (JP)本多真梨子
CV (KR)Kang Eun-ae

Talents

Formule Phenomenale: Self-Evident Proposition
Normal Attack

Formule Phenomenale: Self-Evident Proposition

Normal Attack
Generates threads that control her weapon using formulae, performing up to 3 consecutive strikes.

Charged Attack
Summons the Facilitatrice Automatisee Generaliste Interactive et Omnitache, or "Fagio," and switches it to Decoding mode: Unleashes a sweeping fire attack on enemies in front, as well as periodically fires condensed beams, dealing AoE Cryo DMG.
Radiance: Stellar-Conduct: The condensed beams will instead deal AoE Cryo DMG that is considered Stellar-Conduct DMG.
While in Decoding mode, Fagio's Decoding Power will continuously increase. Firing condensed beams will also further increase its Decoding Power.
When Fagio's Decoding Power reaches the maximum of 100 points, it switches to Power Overdrive mode, in which it fires at opponents with longer intervals, dealing Cryo DMG. It will be unable to switch to Decoding mode at this time.
When not in Decoding mode, Fagio's Decoding Power gradually decreases. When Sandrone is off-field, she will focus on maintaining Fagio, causing its Decoding Power to decrease at 300% the original rate.
Fagio exits Power Overdrive mode when its Decoding Power has decreased to under 50.

Plunging Attack
Plunges from midair to strike the ground below, dealing DMG to opponents along their path and causing AoE DMG on landing.
● Decoding
Fagio will switch to this mode when using a Charged Attack.
When in this mode, Fagio will engage any opponents ahead with a sweeping fire attack, as well as fire condensed beams at intervals, dealing AoE Cryo DMG.
Radiance: Stellar-Conduct: The condensed beams will instead deal AoE Cryo DMG that is considered Stellar-Conduct DMG.
● Decoding Power
When in Decoding mode, Fagio's Decoding Power will continuously increase. When its Decoding Power reaches the maximum, Fagio will be unable to maintain or re-enter Decoding mode.
Lv.15
Detailed Attributes (Lv. 15)
1-Hit DMG204.0%
2-Hit DMG179.7%
3-Hit DMG274.9%
Charged Attack Sweeping Fire DMG115.0%
Charged Attack Condensed Beam DMG327.8%
Charged Attack Condensed Beam Stellar-Conduct DMG218.5%
DMG When in Power Overdrive115.0%
Plunge DMG199.5%
Low/High Plunge DMG399%/498%
Formule Phenomenale: Differential Analysis
E. Elemental Skill

Formule Phenomenale: Differential Analysis

With her impeccable, ladylike poise, Sandrone boards the Tea Party Tactical Assault Hovermech and hovers forward for 6s. During this time, Sandrone can control the travel direction of the craft. Pressing Sprint consumes 10 Stamina and launches her into an elegant high-speed hover mode, in which she will move even faster at the cost of 15 Stamina per second.

When Sandrone starts hovering, if there are opponents nearby, she will also summon a Prismatic Resonance Cannon and fire 2 Prism Shots at any opponents who have yet to cool down, dealing Cryo DMG.
Radiance: Stellar-Conduct: The second Prism Shot will instead deal Cryo DMG that is considered Stellar-Conduct DMG.

When on the Tea Party Tactical Assault Hovermech, Sandrone will also elegantly and quietly repair Fagio, causing Decoding Power to swiftly decrease.
● Decoding Power
When in Decoding mode, Fagio's Decoding Power will continuously increase. When its Decoding Power reaches the maximum, Fagio will be unable to maintain or re-enter Decoding mode.
Lv.15
Detailed Attributes (Lv. 15)
Prism Shot DMG77.0%
Prism Shot Stellar-Conduct DMG51.3%
CD4.0s
Cooldown: 4秒
Formule Phenomenale: Q.E.D.
Q. Elemental Burst

Formule Phenomenale: Q.E.D.

In line with established ladylike behavior, Sandrone summons a large number of Prismatic Resonance Cannons for a frontal bombardment before firing on her foes with a Convective Inhibition Ray, dealing AoE Cryo DMG.
Radiance: Stellar-Conduct: The Convective Inhibition Ray instead deals AoE Cryo DMG that is considered Stellar-Conduct DMG.
Lv.15
Detailed Attributes (Lv. 15)
Bombardment DMG209.5% ×3
Convective Inhibition Ray DMG785.6%
Convective Inhibition Ray Stellar-Conduct DMG523.8%
CD15.0s
Energy Cost60
Cooldown: 15秒
Energy Cost: 60

Passive Talents

Eternal Speculation Engine

Eternal Speculation Engine

Radiance: Stellar-Conduct: When using the Elemental Skill Formule Phenomenale: Differential Analysis, if Fagio's Decoding Power is greater than 50, the second Prism Shot fired by Fagio at nearby opponents will deal 400% of its original DMG as Fagio's Decoding Power is decreased.
Additionally, for every 10 points of Decoding Power Fagio loses, it gains 1 stack of Refined Tactics for 60s (max 10 stacks). When Sandrone uses the Elemental Burst Formule Phenomenale: Q.E.D. while in the Radiance: Stellar-Conduct state, all stacks of Refined Tactics are cleared, causing the Convective Inhibition Ray to deal 100% + (number of stacks cleared) × 10% of its original DMG.
● Decoding Power
When in Decoding mode, Fagio's Decoding Power will continuously increase. When its Decoding Power reaches the maximum, Fagio will be unable to maintain or re-enter Decoding mode.
A Lady's Code of Conduct

A Lady's Code of Conduct

Increases Sandrone's Elemental Mastery based on her ATK. Every 100 ATK will increase her Elemental Mastery by 8. The maximum increase she can gain this way is 160.
Light of Rationalisme

Light of Rationalisme

When party members trigger Superconduct, it will be changed to Stellar-Conduct, and party members' Base Stellar-Conduct DMG will be increased based on Sandrone's ATK: Every 100 ATK she has increases the Base Stellar-Conduct DMG by 0.7%. The maximum increase that can be gained this way is 14%.
Additionally, when Sandrone is within a Polestar Field, she will enter the Radiance: Stellar-Conduct state.
● Polestar Field
When Stellar-Conduct is triggered, the surrounding area will transform into a Polestar Field for a short period of time, and when inside a Polestar Field, certain characters will enter the Radiance: Stellar-Conduct state, which grants various skill buffs.
A Caucus Prelude and a Long Tale

A Caucus Prelude and a Long Tale

When Sandrone is in the party, you will gain additional snack rewards after turning in your Daily Commissions with Katheryne.

Constellations

Narcissorolegium

Morrow After the Golden Dusk1

Morrow After the Golden Dusk

When in Decoding mode, Fagio's Decoding Power increases at a 50% lower rate, and all party members deal 30% increased Stellar-Conduct DMG.
● Decoding
Fagio will switch to this mode when using a Charged Attack.
When in this mode, Fagio will engage any opponents ahead with a sweeping fire attack, as well as fire condensed beams at intervals, dealing AoE Cryo DMG.
Radiance: Stellar-Conduct: The condensed beams will instead deal AoE Cryo DMG that is considered Stellar-Conduct DMG.
● Decoding Power
When in Decoding mode, Fagio's Decoding Power will continuously increase. When its Decoding Power reaches the maximum, Fagio will be unable to maintain or re-enter Decoding mode.
An Heiress Gazed Into the Looking-Glass2

An Heiress Gazed Into the Looking-Glass

Radiance: Stellar-Conduct: Increases CRIT DMG from Charged Attack condensed beams by 40%. Also, each time a beam is fired, CRIT DMG dealt by all condensed beams fired during this Decoding mode period will be further increased by 20%. Max 3 stacks.
● Decoding
Fagio will switch to this mode when using a Charged Attack.
When in this mode, Fagio will engage any opponents ahead with a sweeping fire attack, as well as fire condensed beams at intervals, dealing AoE Cryo DMG.
Radiance: Stellar-Conduct: The condensed beams will instead deal AoE Cryo DMG that is considered Stellar-Conduct DMG.
Refuse the Wake of Dusk, the Moonlit Yoke3

Refuse the Wake of Dusk, the Moonlit Yoke

Increases the Level of Formule Phenomenale: Self-Evident Proposition by 3.
Maximum upgrade level is 15.
In Knowledge Lies the World's True Ground4

In Knowledge Lies the World's True Ground

When Sandrone deals Stellar-Conduct DMG to an opponent, she will also summon an extra Prismatic Resonance Cannon to fire off a coordinated attack which deals Cryo DMG at 125% of her ATK. This DMG is considered Stellar-Conduct DMG, and the effect can occur once every 4s.
Of All Beside, She Takes No Part5

Of All Beside, She Takes No Part

Increases the Level of Formule Phenomenale: Q.E.D. by 3.
Maximum upgrade level is 15.
Narcissus Wakes, Her Eyes Upon the Dawn6

Narcissus Wakes, Her Eyes Upon the Dawn

When Fagio fires a condensed beam for the third time while in Decoding mode, the beam becomes a more powerful Condensed Cluster Beam that fires continuously. This beam will deal up to 4 additional instances of AoE Cryo DMG at 100% of Sandrone's ATK on top of any subsequent original beam fired.
Radiance: Stellar-Conduct: The Condensed Cluster Beam will instead deal 4 additional instances of AoE Cryo DMG at 80% of Sandrone's ATK. This DMG is considered Stellar-Conduct DMG.
Additionally, all Stellar-Conduct DMG dealt by Sandrone is elevated by 20%.
● Decoding
Fagio will switch to this mode when using a Charged Attack.
When in this mode, Fagio will engage any opponents ahead with a sweeping fire attack, as well as fire condensed beams at intervals, dealing AoE Cryo DMG.
Radiance: Stellar-Conduct: The condensed beams will instead deal AoE Cryo DMG that is considered Stellar-Conduct DMG.
● Elevation
Special DMG Boost effect. It is calculated independently of other DMG Boost effects.

Ascension

Guides

Spiral Abyss Statistics

Usage Rate (Constellation)

C0: 85.3% C1: 7.8% C2: 3.0% C3: 0.8% C4: 0.2% C5: 0.2% C6: 2.8%

Builds

Usage Rate: 88.5%
Special Stat:⏳ ATK%🏆 ATK%👑 CRIT DMG
Constellation
C0: 85.0% C1: 10.0% C2: 5.0% C5: 0.0%
Usage Rate: 7.7%
Special Stat:⏳ ATK%🏆 ATK%👑 CRIT Rate
Constellation
C0: 100.0%
Usage Rate: 3.9%
Special Stat:⏳ EM🏆 ATK%👑 CRIT DMG
Constellation
C0: 100.0%

Synergies

Sandrone | Team Composition and Synergy

Character Guide • Synergy: Sandrone

Sandrone

Other

Namecard

Sandrone: Tea Break
Sandrone: Tea Break

Sandrone: Tea Break

Namecard style. Sandrone may have learned to enjoy tea parties from Alain. In those days, even a tea break for two never felt dull. But later, when there were finally enough people for a proper tea party, they left one after another. And in their absence, she seemed to come a little closer to the loneliness Alain had known.

Special Dish

Tea Party Polyphony

Tea Party Polyphony

Outfits

Clockwork Maiden's Waltz

Clockwork Maiden's Waltz

Default

Sandrone's outfit. Having been reborn, she has decided to make herself a new outfit. A new person certainly merits a new dress. Naturally, such an undertaking cannot fail to incorporate a lady's refinement, elegance, and magnanimity... Ah, yes. And perhaps a prayer that it shall remain undamaged in battle, and unstained by coffee or tea, would not be remiss.

Clockwork Maiden's Waltz

Stories

Alain Guillotin would call her Marionette. Behind this name was the story of a loved one he could not forget and whose memories he had naively tried to revive by creating her. But the moment she opened her eyes and tentatively spoke his name, he resolved never to call her that again. It was wrong, he realized, to make this exquisite little creation bear the weight of his sister's life, and of his own mistake. This little creation deserved a life of her very own, just like anyone else born into this world. But from time to time, he still addressed her by that name, if only in his thoughts. He did so because, just as the name "Marionette" suggested, she was pure of heart, kind, and always full of joy. The people of Snezhnaya knew her as "the Lady" or "Lady Marionette." While most spoke of her with the fear that a Harbinger typically inspires, there was also often a distinct note of respect in their voices, a sentiment made clear by descriptions such as "the decisive Lady Marionette" and "the ever-reliable Lady Marionette." But to her friends and colleagues, she was known as Sandrone. While it was originally just a code name, over time the name became a cheerful way for her closest and dearest to address her. They began to associate it with the scents of desserts and afternoon tea, with the elegant turning of book pages and the steady ticking of a mainspring.... And of course, at times, it also evoked the grumbles and even furious outbursts of a lady who had lost all patience, proper etiquette be damned. Once, a friend put this question to her: "What do you want us to call you?" "It doesn't matter, and I don't really care," she replied nonchalantly. "I've always thought names to be something that existed mainly for the convenience of others. What other people choose to call me is, to a very large extent, determined by which part of me they choose to accept." The expression on her friend's face was one that clearly suggested that they were woefully unprepared for her answer. "Anyhow, what I mean to say is: No matter what people choose to call me, I am still myself. I will not change because they have chosen to call me by a different name, and since I do not care for what people call me, why not just let them use the name they're most comfortable with? But as to whether I would respond to the name in question, that is another matter altogether, heh."

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