Bellatrix is the name of a star, and Arciela's weapon is a glowing light in her hand, and since "Bellatrix of Light/Darkness" is what switches that glowing light's element, it's safe to assume that that glow is the Bellatrix.

Image of the real Bellatrix:

--Blue Donkey Kong (talk) 06:20, March 22, 2015 (UTC)

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