Chaos Galaxia

The transformation leaves her looking much like Sailor Galaxia, since she is that warrior possessed, yet every golden accent of the familiar uniform has darkened to black. Her hair burns blood-red, her skin has paled to grey, and her golden eyes are ringed with blue liner. A pair of large bat-like wings now spread from her back and lift her into flight. The bracelets she once wore are gone, shattered in the moment of her change.

Nothing of Sailor Galaxia's own character survives the takeover, and what remains is purely Chaos wearing her shape. Quick to fury and consumed by destructive hunger, she wants the whole galaxy laid to ruin.

Her single appearance comes in the fifth season's finale. Realizing that Eternal Sailor Moon, now shifted into Princess Serenity, means to seal away both the darkness and Galaxia at once, Chaos smashes the guardian's bracelets and claims her body outright. She dares Serenity to a duel with blades, but the Princess will not raise a weapon against her. Declaring that she intends to end the Sailor Wars and snuff out the Light of Hope, she presses the attack until Serenity accidentally drives the Sword of Sealing through her right wing. Enraged, she shatters that sword, which costs Sailor Chibi-Chibi her life, since the child had become the blade to aid Serenity.

Serenity then takes on a bare, angelic form and unleashes the boundless healing of the Silver Crystal, which is her own star seed. As that light bears down, Chaos Galaxia strains to fling the Princess away and kill her, but during the effort Galaxia's sword breaks and the warrior's buried self begins to stir. Serenity reaches out and steadies her until she casts Chaos from her body for good, and with that expulsion Chaos Galaxia ceases to exist. In combat she wielded a strengthened version of Galaxia's might, exceeding even the Light of Hope, striking with sword-launched waves of dark energy and blanketing enemies in a heavy barrage of it, all while keeping the use of Galaxia's cursed sword.