I'm not entirely sure if this is allowed, but I'm gonna try it anyway.

Name: Lilith
Nickname: Dark Saber
Age: almost 6.000 years.
Gender: female
Abilities: Dark Saber is incredibly fast and strong, easily defeating even other Legendary Heroes. She has the ability to turn her sword invisible, can walk on water and air, and her blade can cut through almost any material. She can focus the power of her hatred and create a massive explosive attack, resembling the Getsuga Tenshou, which can wipe out entire castles. She can also turn anything into her steed, improving it as she uses it, has incredible fighting skill, and can influence others simply by speaking, her voice carrying her evil.
As a Heroic Spirit, Saber draws power from a Master. This is usually someone whom she manipulates to do her bidding, twisting them around her finger. When she has a master, her power regenerates far faster, and she can enter Spirit Form. This also helps her rapidly heal all physical damage.
For some reason she can also instantly change her close. Not sure if this is a Noble Phantasm or not, it's just kinda.... random.
Species: Legendary Hero
Appearance(s): [img=http://fc02.deviantart.net/fs70/i/2010/046/6/d/Evil_Saber_by_Mega_kemo.jpg]
[img=http://howimetyourotaku.files.wordpress.com/2011/10/62.png]
From: Fate/Zero..... kinda.....
[youtube]74eldZ2Gu_c[/youtube]
Other: She's a character from an AMV. Lol.