material-l
One of the antagonists of Mahou Shoujo Lyrical Nanoha A's Portable: The Battle of Aces. Material-L, also known as Thunderblade Assailant (雷刃の襲撃者 Ikazuchiha no Shūgekisha) and Levi The Slasher (レヴィ・ザ・スラッシャー Revi za Surasshā) is a "dark copy" of Fate Testarossa. She wields Vulnificus, a copy of Fate's Bardiche.
It is speculated that Levi loves eating sweets, especially lollipops. But some fanworks depict her as a heavy eater, much like Saigyouji Yuyuko of Touhou.
In Mahou Shoujo Lyrical Nanoha INNOCENT, she is known as Levi Russel and her resemblance to Fate is merely coincidental.