All CUBs
Grand Duke

CUB

Grand Duke

DamagePull
Element
lightning
Rank
S-Rank
ATK
997
Signature CUB forHelentine: Lacrimosa
Grand Duke

Active skill

Element
Hermann Grid
Level5/ 5
After pinging a total of 6 basic Signal Orbs, the CUB button will become available. After casting, Grand Duke will turn its base toward the target, concentrate energy from the three lamps, and fire a beam at the target, dealing 650% Lightning DMG 3 times.

Passive skills

False Color
Level5/ 5
Grand Duke's Active Skills deal 70% more damage.
Iridescence
Level5/ 5
Increases the carrier's ATK by 100.
Coma Aberration
Level5/ 5
Each time Grand Duke casts an Active Skill, the carrier's Extra DMG Bonus increases by 5% for 8s. Duration resets every time it is triggered.
Fluorite Dispersion
Level5/ 5
Increases the carrier's Lightning DMG by 10%. If the carrier has the Glaciation effect, Ice DMG increases by 10%.
Fresnel Lens
Level5/ 5
When Lacrimosa casts Deflection, Cathexis, or Regression with Grand Duke equipped, she will summon Grand Duke to launch a joint attack and pull in enemies. Grand Duke flies into the air and launches three sonic attacks in a pendular motion, dealing 1000% Lightning DMG 3 times. Base DMG of Cathexis, Regression, and Metaphor Surge increases by 50%.

Background

Background I

The self-proclaimed royal tutor to Helentine, and an equally self-proclaimed aloof artist. Possessing an eccentric taste and an overzealous urge to share, he harbors a peculiar love for both classical symphonies and sitcoms with laugh tracks.

Background II

Despite minor artistic disagreements with Helentine, Grand Duke remains a reliable battlefield ally. His ability to draw enemies together allows Helentine's weapons to perform at their fullest potential.

Files

No.001

Originally, Grand Duke was a bespoke tutoring AI commissioned by the Spelmin Family for Helentine's classical music education. Programmed as an aristocratic maestro of refined taste, he took immense pride in playing the part. As Helentine's former tutor, he utterly despised her fondness for film and TV soundtracks, dismissing it as "dreadful taste" beneath aristocratic dignity. In response, Helentine could only laugh it off, all while dutifully completing the curriculum Grand Duke laid out for her.

No.002

After Helentine was reconstructed into a Construct, Grand Duke was uploaded into her CUB. Empowered by an independent processing system and prompted by Helentine's suggestions, Grand Duke began dabbling in various films and cinematic works.
Things took an unexpected turn, though. Rather than the emotional depth and imagery that cinema excels at, Grand Duke, being an AI, gravitated toward short dramas and short videos. Their high information density, low barrier to understanding, and modular, bite-sized format suited it perfectly, and it was hooked in no time.

No.003

Still, its efforts bore fruit. After soaking up a wealth of cinematic knowledge, Grand Duke became widely adored for its utility as a mobile point light source. It can pinpoint the perfect lighting angles for photographers, fill in light to match the mood, and ensure flawless shots every single time, making it an indispensable companion for night photography.