Undying Slaughter had icy blue eyes, chilling presence, and ruthless fighting style as Soul Reaper Jet. Undying Slaughter was truly Soul Reaper Jet once, but her ruthless, mad eyes indicate that there was nothing human left in her.[2]
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Ability
Undying Slaughter, a Corrupted Beast with a colossal node of vile darkness infesting her soul, could be considered a Terror or a Titan.[2]
The unique nature of Jet's Aspect made her attacks physical, bypassing physical defenses and striking the soul.[2](Refer to Jet's Aspect, Abilities & Flaw)
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No amount of physical might, impregnable armor, and unholy powers could stop her ghostly blade and its elusive movements.[4]
Trivia
In Chapter 1401, Undying Slaughter of the Six Plagues had slain Sunny for the first time. Gloomy and Happy shadows were slain.