[list][*]Name: Her real name is unknown, but history has bestowed the name "Jack the Ripper" upon her.  More often than not, though, she simply goes by "Assassin", her Servant class.
[*]Age: Unknown; physically around 12.
[*]Gender: Female
[*]Appearance: [url=http://safebooru.org/index.php?page=post&s=view&id=1714631]I'm a nasty surprise,[/url] [url=http://safebooru.org/index.php?page=post&s=view&id=1698507]I'm a devil in disguise...[/url]
[*]World of Origin: The Fate/ side of the Nasuverse; primarily /Apocrypha and /Grand Order.
[*]Personality: "Jack" is a rather contradictory young girl.  Pure and innocent yet cruel and savage, her rational mindset conflicting with her emotional weakness, she repays kindess and cruelty alike with equal measure.  Despite her outfit, she is shy and doesn't like going out in the sun, much preferring the cover of night.  She always seems to refer to herself as "we" and "us", and strongly yearns for a mother figure.
[*]History: Jack the Ripper is an infamous serial killer, whom little is known about aside from the fact that he murdered several prostitutes in the Whitechapel area of London during the late 19th century.  The true identity of the Ripper was never discovered, and even today who he was or even what his real name was are unknown.  However, his infamy was so great that his spirit ascended to the Throne of Heroes to become a "Heroic" Spirit, who amongst other things could be summoned as a Servant during the Grail War... Revealing that "he" was, in fact, a [i]"she"[/i]; the legendary serial killer was in fact a young homeless girl with mother issues.
[*]Abilities: As a Servant of the Assassin class, "Jack"'s possesses superhuman physical capabilities.  Whilst her strength and endurance pale in comparison to the Saber class, she more than makes up for it with her speed and agility.  Due to being an Assassin, she also possesses the ability to conceal her presence, not only allowing her to easily hide in cover or shadows but making her immensely difficult to detect via supernatural means; in addition, and unique to her amongst Assassins, those who encounter her quickly forget all about her, including her appearance and capabilities, although this fails to work on those in regular contact with her.  She possesses the Mental Pollution ability, which means that due to her fractured mind she possesses a good deal of resistance to mental interference and mind control, and thanks to the Surgical Procedure ability she has a crude understanding of anatomy, surgery and medicine.  As a Servant, she possesses Noble Phantasms, items that represent her legend.  Specifically, Jack possesses two such Noble Phantasms: [list][*]The Mist: [i]Darkened Misty Metropolis[/i]: Taking the form of an antique lantern, by activating The Mist "Jack" can create a field of thick smog, obscuring the landscape and providing cover to those within it.  However, the smog is also a curse that will cause anyone within it to begin choking and doubling over in immense pain, eventually culminating in a painful death.  "Jack" can designate who is affected by this curse, however, and if she doesn't want someone to be hurt by it they won't.  For the purposes of this RP, the curse only really affects nameless henchmen-level characters.
[*]Maria the Ripper: [i]The Holy Mother of Dismemberment[/i]: A set of four long knives "Jack" carries around her waist.  Whilst they are mildly powerful magical weapons in their own right, by calling the name of this Noble Phantasm she can activate a powerful killing curse which, under the right circumstances, will kill the target instantly as the knives manifest inside their body and vivisect them.  However, the circumstances are rather strict, as the killing curse will [i]only[/i] affect a female target on a misty night, and for the purposes of this RP the smog produced by The Mist does not count towards these circumstances.  Whilst physical defence is all but impossible against the killing curse of Maria the Ripper, a strong resistance to magic and curses can allow the target to negate its effects.[/list]
[*]Other: [/list]