Berserker (Fate/Deep Stake)

Berserker is the Berserker-Class Servant in the Holy Grail War of Fate/deep stake.

Identity
Berserker's identity is unknown.

Personality
Due to Mad Enhancement, Berserker lost his sanity and is only an enraged warrior.

Fate/deep stake
At first, Berserker's Master had a hard time controlling him due to his insanity. Unable to bear the pain caused by his uncontrollable Servant, a Command Seal was inadvertently consumed to allow Berserker to act on his own, causing the madman to flee to the forest. Berserker's Master becomes more stable, but is slapped by his superior due to his lack of control over his Servant.

A few days later, Berserker encounters Saber, Bernard and Tyler who is being cornered by him and Archer. Saber distracts Berserker so that Bernard and Tyler can run away.

Abilities
Berserker's immense strength is enough to make Saber feel overwhelmed.