Sandrone
Mirrored Analysis
IceClaymoreFatui Jun 30, 2026The 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
Base HP
13226
Base ATK
342
Base DEF
752
CRIT Rate
19.2%
Lv.1 → Lv.90 Ascension Materials
IceTalents

Formule Phenomenale: Self-Evident Proposition
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
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

Formule Phenomenale: Differential Analysis
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

Formule Phenomenale: Q.E.D.
Radiance: Stellar-Conduct: The Convective Inhibition Ray instead deals AoE Cryo DMG that is considered Stellar-Conduct DMG.
Passive Talents

Eternal Speculation Engine
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

A Lady's Code of Conduct

Light of Rationalisme
Additionally, when Sandrone is within a Polestar Field, she will enter the Radiance: Stellar-Conduct state.
● Polestar Field

A Caucus Prelude and a Long Tale
Constellations
Narcissorolegium
1Morrow After the Golden Dusk
● Decoding
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
2An Heiress Gazed Into the Looking-Glass
● Decoding
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.
3Refuse the Wake of Dusk, the Moonlit Yoke
Maximum upgrade level is 15.
4In Knowledge Lies the World's True Ground
5Of All Beside, She Takes No Part
Maximum upgrade level is 15.
6Narcissus Wakes, Her Eyes Upon the Dawn
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
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
Ascension
Character Ascension
Talent Upgrade (All 3 Talents)
Total Materials Required
Guides
Spiral Abyss Statistics
Usage Rate (Constellation)
Usage Rate (Characters, Weapons, Artifacts)
Builds
Synergies
Other
Namecard

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
Outfits
Clockwork Maiden's Waltz
DefaultSandrone'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.
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."
