Achilles

Personality: he's possibly one of the most loyal servants out there and it's not because he has some kind of driving force like Annie's love or semirami's motherly protection, he just likes to be loyal, he's borderline invincible and cocky, he's polite to his master and to those he likes but that's about it
Hidden abilities: Achilles heel (he can only be hurt once his heel is cut, his heel will heal after 24 hours)
Riding rank: EX (just as a refresher this skill allows him to drive or ride anything without any prior knowledge, perfectly)
Class: warrior-ruler
Grand magic: one-on-one (fake)
Rank: EX
Weapons: charmer's eyes, riders spears, golden chariot of Zeus

Amelia Earhart

Personality: the lighthearted pilot joins the battle, she's happy-go-lucky and often doesn't think things through most of the time, she's not the strongest servant and relies completely on her plane in a fight with very little physical strength
Class: warrior
Hidden abilities: riding rank EX
Heart of gold (her kindness can sometimes convince others to spare her but it's rare)
Rank: C
Weapons: pistol, magic battle plane
Grand magic: Amelia Earhart's airshow

Jack the Ripper (caster version)

Personality: the assassin class servant returns but this time she's a caster for whatever reason, her murderous personality hasn't changed much but she's a little less murderous and a lot more childish I guess
Grand magic: the many forms of Jack the Ripper
Class: caster
Hidden abilities: assassins blessing (assassin class servants deal half damage to her)
Weapons master EX
Weapons: an assortment of knives, blood book
Rank: B

Alexander the Great (full grown)

Personality: the king of conquerors returns in his full grown form, he does not share memories with his younger self and they can be summoned separately, in his age he has lost much of his kindness and turned it into a kingly sort of protection instinct
Hidden abilities: king of conquerors (complete) (can summon soldiers to his aid up to the size of a small army)
Kings trickery (he deals double damage agonist Egyptian servants and takes double damage from them)
Class: warrior
Rank: EX
Grand magic: the farthest ocean: okeanos