Final Master and his Berzerker. I just couldn't think of a better option, so I used this classic because he's a badass. Okay that's a half lie, I just really wanted this guy because he's a beast.
[hider=Drasinian Von Einzbern]
Name:Drasinian von Einzbern

Age: 5, appears like he's 16

Gender: Male

Nationality: German, I guess

Height/Weight: 5'9 and 180 pounds

Appearance: [img=http://img2.wikia.nocookie.net/__cb20131202044755/yakuza-mob-roleplay/images/3/3f/Naruto-characters-anime-boy-with-white-hair-and-red-eyes.jpg]

Personality: While on the outside he appears emotionless and apathetic to everything, he's actually very lively behind closed doors. He is quite easy to anger, and rather vindictive about it, but can also be rather patient in extracting his vengeance, wanting to make sure that he covers his tracks, and that everything goes off with out a hitch. He holds a special hate of the Einzbern's who created him, since they treat him like a tool instead of a person.

Weapon: A combat version of Alchemy, he can create deadly constructs, mostly of a wireframe style, to destroy his enemies while he watches from a distance. Anyone who gets past them will have to deal with his enhanced speed and a deadly array of weapons hidden all over his body. 

Abilities: He prefers to let his constructs to the fighting, but is no slouch in one on one combat due to his enhanced speed and the fact the every inch of his body under his clothes has some sort of hidden weapon, be it knives, compact guns, you name it, he's probably got it. They are all special enchanted to break through the defense of mage's against such mundane weaponry, thus making him a dangerous opponent. He has a huge amount of prana, as he was made specifically to be the Master of a Berzerker, but this comes at the cost of limited life span. More likely than not, he will die very soon after the War is over if his wish goes unfulfilled.

History/Background: Will add it in later

Assets: Large amounts of cash due to the Einzbern's fortune, a base of operations in the city, below ground, and an armory to resupply his hidden weapon's cache.
[/hider]

[hider=Berzerker]
Class: Berserker

Master: Drasinian von Einzbern

True Name: Lancelot

Gender: Male

Height/Weight: 191cm/81kg

Alignment: Lawful Mad

True Appearance:[url=http://img2.wikia.nocookie.net/__cb20121211184806/typemoon/images/0/0b/Zero_berserker.png]For Those who haven't seen Fate/Zero[/url]

Public Outfit: He has none due to the fact that he is in his spirit form outside of combat.

Stats;
Strength: A
Endurance: A
Agility: A+
Mana: C
Luck: B
Noble Phantasm: A

Class Skills
■ Mad Enhancement: C

Personal Skills
■ Magic Resistance: E,Magical damage is reduced somewhat.

■ Protection of the Fairies: A, Grants increased Luck in Critical situations on the battlefield.

■ Eternal Arms Mastership: A, Allows him to fight to the full extent of his abilities, no matter his mental state, due to the techniques and skills being ingrained into his mind, and body.

Noble Phantasm
■ Knight of Honor: A Knight Does Not Die with Empty Hands
Rank: A++
Type: Anti-Unit Noble Phantasm
Allows him to take anything that can conceptually be identified as a 'weapon' and make it his Noble Phantasm, giving it a twisted, demonic look. This can also be done with the Noble Phantasm's of other's, if he manages to grab them and if they can be associated as a weapon. This allows for even the most mundane of items to be wielded effectively against other Servants, as well as modern weapons like guns. Mundane item's become D-ranked Noble phantasms, while phantasm's of a higher rank, maintain that rank. Can be canceled out by any ability or spell that cuts off prana circulation from Lancelot to the weapon.

■ For Someone's Glory: Not For One's Own Glory
Rank: B
Type: Anti-Unit Noble Phantasm
Allows him to take the shape of another person, as well as cloaks him in shadows rendering most of his status', abilities, and his true name completely unknown to all except his master. However, due to being of the Berserker class, this can only be used through use of a command spell.

■ Arondight: The Unfading Light of the Lake
Rank: A++
Type: Anti-Unit Noble Phantasm
A powerful, demonic blade, and the sister sword of Excalibur, wielding it immediately seals For Another's Glory and Knight of Honor. It gives him +1 to all parameters, as well as deals additional damage to Servants bearing the dragon attribute.
[/hider]