Cryo damage dealer with a reaction-focused Radiance state
Released Jul 1, 2026
Sandrone is a 5-star Cryo claymore character who uses charged attacks to control Fagio's firing modes, while her skill provides mobility and Prism Shots. Consider her when you can use her Radiance states: Stellar-Conduct strengthens Superconduct, and Stellar Swirl strengthens Cryo Swirl after a nearby party member triggers it. Her mechanics reward managing Fagio's Decoding Power and timing her burst with Refined Tactics stacks.
ElementCryoWeaponClaymoreRarity5
Sandrone GUIDE
Understand Sandrone
Useful when…
Deal Cryo damage through Fagio's charged-attack firing and her burst's frontal bombardment.
Support Superconduct or Cryo Swirl as Stellar-Conduct or Stellar Swirl when her Radiance conditions are met.
Hover forward for up to 6 seconds with her skill, including a faster mode that consumes Stamina.
Fagio's firing modes
Sandrone's normal attack makes up to three strikes. Her charged attack summons Fagio in Decoding mode: it sweeps with fire and periodically fires condensed beams, dealing area Cryo damage. The beams can instead count as the corresponding Stellar Glimmer reaction damage when that Radiance state applies. Decoding Power rises continuously in Decoding mode and rises further when beams fire. At 100 points, Fagio enters Power Overdrive: it fires at longer intervals and cannot switch back to Decoding mode. Outside Decoding mode, its power falls; while Sandrone is off-field it falls at three times its original rate. Fagio exits Overdrive below 50 points. This makes charged-attack use and time away from Sandrone part of managing its firing pattern.
Skill, burst, and Radiance reactions
Differential Analysis lets Sandrone hover forward for 6 seconds with directional control. Sprinting costs 10 Stamina to enter a faster hover, which then costs 15 Stamina per second. At skill start, nearby opponents allow Fagio to fire two Prism Shots at targets that have yet to cool down; the second shot can deal the corresponding Stellar Glimmer reaction damage. While Sandrone rides the hovermech, Fagio's Decoding Power decreases swiftly. Q.E.D. fires three bombardment strikes followed by an area Cryo ray; the ray can instead count as the corresponding Stellar Glimmer reaction damage. The burst has a 15-second cooldown and costs 60 Energy. In Stellar Jubilee's rules, she enters Stellar-Conduct while inside a Polestar Field, or Stellar Swirl for 8 seconds after a nearby party member triggers Stellar Swirl. Superconduct and Cryo Swirl triggered by a party member become Stellar-Conduct and Stellar Swirl reactions instead; their Base DMG increase is 0.7% per 100 ATK, capped at 14%.
ATK, Elemental Mastery, and burst timing
A Lady's Code of Conduct grants 8 Elemental Mastery for every 100 ATK, up to 160 Elemental Mastery. This gives ATK value beyond its direct role in her attacks, and Stellar Jubilee also uses ATK for its reaction Base DMG increase. Eternal Speculation Engine applies only in Radiance: Stellar Glimmer: if Fagio has more than 50 Decoding Power when the skill is used, the second Prism Shot deals 400% of its original damage as Fagio loses Decoding Power. For every 10 points lost, Sandrone gains one Refined Tactics stack for 60 seconds, up to 10. Using her burst in that state clears all stacks, making its ray deal 100% plus 10% of its original damage per cleared stack. This creates a specific skill-to-burst payoff, but does not describe a benefit from collecting stacks outside Stellar Glimmer.
Talent priorities and costs to weigh
The charged attack is the control point for Fagio's Decoding mode, and her skill and burst provide Prism Shots and burst damage, so those combat tracks are the direct talent investments to consider. Ascension is separate. The listed combat talent materials are Vagrancy books, Drive Shaft materials, and Madman's Restraint at the final listed upgrade step; ascension uses Shivada Jade, Subdetection Units, and Drive Shafts. Her normal and plunging attacks remain conventional claymore attacks, but no special reaction or support effect is given for them. Her hover's acceleration spends Stamina, and operating the skill while Fagio is in use rapidly lowers Decoding Power, so skill timing has a real tradeoff with Fagio's current mode.
Limitations and tradeoffs
Fagio enters Overdrive at 100 Decoding Power and cannot return to Decoding until its power falls below 50.
Off-field time and riding the hovermech reduce Fagio's Decoding Power, with the latter described as swift.
The Stellar Glimmer burst payoff requires the specific state, skill condition, and Decoding Power thresholds; the stack effect should not be assumed in other states.
Common mistakes to avoid
Treating Stellar Jubilee's Stellar-Conduct and Stellar Swirl states as automatic without their stated field or reaction conditions.
Letting Fagio reach 100 Decoding Power and expecting it to fire in Decoding mode before its power falls below 50.
Formule Phenomenale: Self-Evident Proposition · Normal attack
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 Glimmer**: The condensed beams will instead deal AoE Cryo DMG that is considered the corresponding Stellar Glimmer reaction 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.
Purchased talent coefficients at level 1 and 1. These are individual skill values; they do not represent total build damage.
Effect
Level 1
Level 1
1-Hit DMG
76.3%
76.3%
2-Hit DMG
67.2%
67.2%
3-Hit DMG
102.8%
102.8%
Charged Attack Sweeping Fire DMG
43.0%
43.0%
Charged Attack Condensed Beam DMG
122.5%
122.5%
Charged Attack Condensed Beam Stellar-Conduct DMG
81.7%
81.7%
Charged Attack Condensed Beam Stellar Swirl DMG
122.5%
122.5%
DMG When in Power Overdrive
43.0%
43.0%
Plunge DMG
74.6%
74.6%
Low/High Plunge DMG
149%/186%
149%/186%
Formule Phenomenale: Differential Analysis · Elemental skill
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 Glimmer**: The second Prism Shot will instead deal Cryo DMG that is considered the corresponding Stellar Glimmer reaction DMG.
When on the Tea Party Tactical Assault Hovermech, Sandrone will also elegantly and quietly repair Fagio, causing **Decoding Power** to swiftly decrease.
Purchased talent coefficients at level 1 and 1. These are individual skill values; they do not represent total build damage.
Effect
Level 1
Level 1
Prism Shot DMG
32.4%
32.4%
Prism Shot Stellar-Conduct DMG
21.6%
21.6%
Prism Shot Stellar Swirl DMG
32.4%
32.4%
CD
4.0s
4.0s
Formule Phenomenale: Q.E.D. · Elemental burst
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 Glimmer**: The Convective Inhibition Ray instead deals AoE Cryo DMG that is considered the corresponding Stellar Glimmer reaction DMG.
Purchased talent coefficients at level 1 and 1. These are individual skill values; they do not represent total build damage.
Effect
Level 1
Level 1
Bombardment DMG
88.2% ×3
88.2% ×3
Convective Inhibition Ray DMG
330.8%
330.8%
Convective Inhibition Ray Stellar-Conduct DMG
220.5%
220.5%
Convective Inhibition Ray Stellar Swirl DMG
330.8%
330.8%
CD
15.0s
15.0s
Energy Cost
60
60
Eternal Speculation Engine
**Radiance: Stellar Glimmer**: 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 Glimmer 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.
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.
Stellar Jubilee: Light of Rationalisme
Sandrone will enter the Radiance: Stellar-Conduct state when she is inside a **Polestar Field**, or the Radiance: Stellar Swirl state for 8s after a nearby party member triggers a Stellar Swirl reaction. When a party member triggers a Superconduct or Cryo Swirl reaction, it becomes a Stellar-Conduct or Stellar Swirl reaction instead, and the Base DMG of the aforementioned reaction is also increased by 0.7% for every 100 points of Sandrone's ATK. A maximum increase of 14% can be obtained in this way.
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.
