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Greyy is a 4★ Splash Caster who specializes in AoE and, unusually for his class, Slow. As a Splash Caster, Greyy's attacks do area-of-effect Arts damage to enemies in the adjacent tiles to the target with an attack range of 2×3 tiles with a 1-tile extension in front that is improved to 3×3 tiles at Elite 1, and high ATK in exchange for ahigh attack interval and DP cost. Greyy's ATK, however, is noticeably lower than other Splash Casters.
Representing Greyy's Slow specialization is his talent, Electrostatic Field, which slows enemies hit by his attacks for a brief time. The slow effect's duration is very short, but Greyy's skills mitigate this limitation:
- The first skill, Tactical Chant β, is an intermediate ASPD buff which improves Greyy's overall DPS and is best suited when a burst of Arts splash damage is needed, as well as making his attacks slow enemies more consistently.
- The second skill, Electrostatic Discharge, buffs Greyy's ASPD more than Tactical Chant β and extends the duration of Electrostatic Field while active. Due to its effectiveness which allows Greyy to slow enemies at almost the same rate as Stopper Supporters, Electrostatic Discharge should be his go-to skill, though one should pay attention to its rather low uptime.
Greyy SPC-Y Operator Module, New Beginning, reduces his DP cost by 8 (to 24 before Potentials are accounted for) in addition to increasing his maximum HP and ASPD; once upgraded, Electrostatic Field's slow duration is extended.
Greyy's first base skill, Electrostatic Field (not to be confused with his talent), increases 
Drone recovery rate by 20% when he is assigned to a Power Plant. His second base skill, Skillful Craftsman, increases the byproduct rate of material processing by 50% when Greyy is assigned to the Workshop.
Overall, Greyy is an unusual but effective Splash Caster which can both deal Arts damage to multiple enemies and slow them down, making him a useful addition in situations where fast-moving enemies in groups are expected. Greyy's presence is a pleasant light on the bleak world of Terra.
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