User blog comment:B214/Question and Answers 2/@comment-4547267-20140604230500/@comment-24866657-20140605050817

@jopjopjop

That's the name, it does not affect the appearance of the sacred gear itself (the author was trying to use Japanese character forms and what), like Twilight Healing other name or Night Reflection other name, Twice Critical other name is Hand of the dragon and yet Issei's first form is a gauntlet, not a dragon arm like Siegfried, I would even bet that if Issei lost his left arm then when he activated his Boosted Gear he would grow an armored arm if you insist on following the name of the sacred gear.