Berserker

Rider of “Red” [Servant]
One of the Servants of the Red camp. Though he was deceived by Shirou Kotomine, he understood the situation and reluctantly decided to serve him. A natural-born warrior who, rather than concerning himself over whether or not Shirou’s wish would be fulfilled, looked forward to his showdown with Archer of Black more than anything else.
His true name is Achilles. The fastest hero among all humanity, lauded for his great valor and prowess in the Trojan War. He definitely ranks equals with Heracles in terms of fame—after all, his name is attached to one of the vital points of the human body.
However, in contrast with his fame, the time during which Achilles accomplished great deeds was comparatively short. His deeds are also almost completely carved into the Trojan War alone. He had the turning point of his life thrust before him at a young age: he could run through his life like a transient gale in exchange for accomplishing magnificent deeds in the Trojan War, or he could become a person unknown to anyone in the world and live a long life.
Achilles gave his answer to his mother without hesitating. “—I will live a short yet brilliant life.”
Achilles was raised by Chiron and, after undergoing training as a hero, he threw himself into the Trojan War. Meeting his sword friend Patroclus, meeting his wife, battles and sworn rivals, meeting Hector—
Without a doubt, Achilles ran through his life while treating all of those things as a joy to have experienced.
He is without a doubt first rate as a Servant. Even among the Servants from Greek legend, he boasts of power that ranks next to Heracles. He also has an abnormally abundant number of Noble Phantasms. In the beginning, all these Noble Phantasms were written out, and when I consulted over how many of them should be used, Mr. NP said, “Isn’t a super-strong Servant with an abundance of Noble Phantasms fine?”, and easily permitted all of them to be adopted. I never thought I would end up using all of them…
Naturally, he is a Servant who would instantly run out of prana if he used them in a normal Holy Grail War. The prana consumption of Rider’s chariot is uncommonly harsh in particular, and only a first rate Master could fully utilize him.
Additionally, besides the Rider class, Achilles has aptitude as a Lancer, Berserker and, quite unusually, a Shielder. His complement of Noble Phantasms is slightly different in each of the other classes. For instance, as a Lancer, he would lose his chariot since it is his Noble Phantasm as a Rider, but his spear would gain the secondary effect of causing HP reduction.
His fatal weak point, his heel, serves as the linchpin for his Noble Phantasms “Andreis Amarantos: Amaranth of the Brave”, which maintains his immortality, and “Dromeus Cometes: Comet Form”, for which he is extolled as the fastest, and when his heel is pierced, these two Noble Phantasms disappear. After being pierced once, it is extremely difficult for his heel to be healed, and, without the use of some extraordinary means, there is no way for him to completely regain his running speed afterwards.
In this Great Holy Grail War, Achilles wished for a showdown with his teacher, Archer of Black, and gave his assent to Shirou Kotomine’s actions for the sake of accomplishing that. This might be because, leaving aside his animosity towards Semiramis, he does not really hold much ill feelings towards Shirou. Just as Archer of Black aptly pointed out, Achilles is naïve when it comes to his recognition of enemies and allies. This is a probably demonstration of the difference of experience between him and the older Cu Chulainn, who is able to decisively kill when he needs to kill even when split between enemies and allies in such a manner.
His connection to Atalanta actually begins from a story he heard from his father in life. His father, who was always somehow gentle and could never stand up against his mother, had spoken of his encounter with Atalanta embarrassingly, and because of that the young Achilles always remembered her. He never got the chance to meet her in life, though.
Achilles thinks that it is his fault for overlooking Atalanta’s transformation while engrossed in his own battle. He fought her in her rampage as a way of atonement. Achilles cried out of guilt for having crushed Atalanta’s dream.
But I’d like to think that it was that very naivety and tears of her that granted Atalanta a small measure of salvation at the very end.

Berserker (Cú Chulainn Alter) - Berserker

Illustrator and Voice actor
Illustrator: Shimadoriru
Voice Actor: Canna Nobutoshi

Parameters
Strength: A
Endurance: B+
Agility: A+
Mana: C
Luck: D
Noble Phantasm: A

Personal Skills
Divinity: C
Frenzy of the Faeries: A
Protection from Arrows: C
Battle Continuation: A

Class Skills
Mad Enhancement: EX (equivalent to C)

Noble Phantasm
Curruid Coinchenn
Rank: A
Type: Anti-Unit

Profile
The legendary warrior of the Ulster Cycle of Celtic mythology. A member of the Red Branch Knights and the strongest fighter of Ulster, he won his fame with his mastery of the invincible spear techniques taught to him by Scáthach, the ruler of the alternate realm called the Land of Shadows.
He has unusually taken form as a Berserker. Some factor of his summoning also caused all of his equipment to change and reversed his temperament. His expressions become cold, and the crimson demonic spear that is his Noble Phantasm has been mixed with darkness, overflowing with a foreboding aura.

Level 1 Bond
Height: 185 cm
Weight: 72 kg
Source: Ulster Cycle
Region: Europe
Alignment: Chaotic Evil
Gender: Male

His Rune Magic is used only to strengthen his body.

Level 2 Bond
Frenzy of the Faeries: A

The roar of Cú Chulainn awakens the spirits sleeping within the earth and crushes the will of enemy forces.
This mental interference causes a temporary decrease in STR and AGI in all enemies.

Level 3 Bond
The altered and twisted form of Cú Chulainn, summoned by Queen Medb's wish.
He reigned as the Mad King and brought chaos upon the land of America.

This is not what his berserker form is supposed to be in life, nor how he is supposed to be when summoned as a Berserker.
When receiving the backup from the Holy Grail, his power surpasses his Lancer or Caster form.

Level 4 Bond
Gouging Piercing Spear of Carnage — Gáe Bolg
Rank: B++
Type: Anti-army Noble Phantasm
Range: 5-50
Maximum Targets: 100

The homing demonic missile that is the proper Noble Phantasm of Cú Chulainn,
In his Alter form, it has increased power and effective range as he throws with such utmost strength that he breaks apart his own body.
This attack causes instant death in all enemy targets, in addition to dealing great damage if that does not take effect.
(By use of his Runes, he regenerates his flesh as he is throwing so he does not take any physical damage – though this does nothing for the enormous pain that he suffers.)

Level 5 Bond
Grinding Crunching Beast of Death Tusks — Curruid Coinchenn
Rank: A
Type: Anti-unit Noble Phantasm (Self)
Range: –
Maximum Targets: 1

The storm of Cú Chulainn's rage wraps around him like armour and temporarily takes form as the exoskeleton of the Curruid, the monster of the crimson sea, from which the demonic spear Gáe Bolg was made. Wearing this offensive armour raises his CON and also grants him EX rank STR.
While this Noble Phantasm is active, he cannot use Gouging Piercing Spear of Carnage.

Interlude
A Disaster-Class enemy found in Chapter Five.
At this point, since you are the main character, you might as well summon a certain Archer wearing a Mythological Mystic Code, and have the two of them fight in a mysterious space until the end of time.
So, how about it?

Jack the Ripper, Legendary Serial Killer
The perpetrator of a series of bizarre murders in 19th Century England. A young girl filled with contradictions, possessing properties of both day and night. Her personality is pure, but cruel at the same time. Though her manner of speech is innocent, she is quick of thought. She is rational, but is emotionally weak. She responds cruelly to others' ill will, but is soft against good will. And although she wears revealing clothing, she is shy, and doesn't go out during the day. She yearns strongly for a mother, and if her Master is female, she will insist on calling them "Mother".

• Class: Assassin (Berserker)
  
• Source: Historical fact
  
• Region: United Kingdom
  
• Alignment: Chaotic Evil
  
• Sex: Female
  
• Height: 150cm
  
• Weight: 45kg
  
• Armament: Knives, Black Scalpel
  

Illustrations: Sanada Taketo
Creator: Yuichiro Higashide

Legends

Status

• STR: C
  
• CON: C
  
• AGI: A
  
• MGI: C
  
• LCK: E
  
• Noble Phantasm: C
  

Skills

• Misty Night Murderer - Rank A:
  

As a murderer rather than an assassin, she can strike before her victim. However, she can only unconditionally take the first strike at night. During the day, a luck roll is required. Jack the Ripper's victims are believed to have all been attacked while off-guard.

• Information Erasure - Rank B:
  

At the instant a battle ends, her abilities, true name, appearance, and other information disappear from witnesses' and enemies' memories/records, even if the battle took place in broad daylight, or was recorded on a device such as a camera. To counter this, one must deduce her identity from evidence left at the scene.

• Mental Pollution - Rank C:
  

Has a moderate chance of blocking mental interference-type magecraft. If her Master has an evil alignment, or is cruel to her, this mental pollution gradually rises. Her chances of blocking magecraft will increase, but her already broken spirit will begin to irreversibly corrupt.

• Surgical Operation - Rank E:
  

Can heal her Master or herself using a blood-stained scalpel. It looks risky, but she manages somehow. The techniques are from 120 years in the past, but are improved a little with mana. Jack the Ripper killed victims in ways that would require anatomical knowledge, such as removal of specific organs.

• Presence Concealment - Rank A+:
  

A skill that suppresses presence as a Servant, suitable for covert action. If presence were fully suppressed, she would be nearly impossible to detect. However, when prepared to attack, Presence Concealment's rank falls substantially. This weakness is compensated for with "Misty Night Murderer", allowing for a perfect surprise attack.

• Mad Enhancement - Rank C:
  

If summoned as a Berserker, she gains this skill. Increases all parameters in rank with the exception of Luck and Mana, but removes the ability to speak or have complex thoughts. As a Berserker, she is only active at night, with "Darkened Misty Metropolis" always active, and will attack anything that possesses mana.

Noble Phantasm

• Maria the Ripper: The Holy Mother of Dismemberment
  

Normally four D-rank knives, but under certain conditions, they are boosted by the grudge of "the 80 thousand children in London's slums, abandoned by prostitute mothers for the sake of their livelihoods, unable to even become prostitutes", with brutal results. There are three conditions. "It is night-time", "the target is a woman (or female)", and "it is misty". When all the conditions are fulfilled and the Noble Phantasm is activated, the target's innards are forced out of their body, and they become a dismembered corpse. When the conditions are not met, it is limited to simple damage, but increases in power with each condition that is fulfilled. As the Noble Phantasm is not an attack from a knife but rather a variety of curse, it can be used at long range. To defend against this Noble Phantasm, resistance against curses is required, rather than physical defence.

• The Mist: Darkened Misty Metropolis
  

A Noble Phantasm that creates a mist-filled barrier. The mist itself, created with mana, is the Noble Phantasm. Although it is a means of keeping people out, a non-magus trapped inside the barrier will die after a few turns. A magus will not die immediately, but will take continuous damage. A Heroic Spirit will not take damage, but their Speed will decrease by one rank. The user of the Noble Phantasm is able to choose who is or is not affected by the fog. As those trapped in the fog lose their sense of direction, an "Instinct" skill ranked B or higher or some kind of magecraft is necessary to escape. The large quantity of soot emitted from the Industrial Revolution onward became a smog of sulphuric acid that caused disaster to London in the 1950s. "Darkened Misty Metropolis" is a Noble Phantasm that reproduces that "mist of death".