| Servant Skills |
|---|
| A • B • C • D • E • F • G • H • I • J • K • L • M • N • O • P • Q • R • S • T • U • V • W • X • Y • Z • # |
O' Polar Star, Show the Way
| Rank | User | Class | Notes |
|---|---|---|---|
| B | Calamity Jane | Archer |
Oath of Protection
Oblivion Correction
| Rank | User | Class | Notes |
|---|---|---|---|
| A | Jeanne d'Arc (Alter) | Avenger | |
| Angra Mainyu | Avenger | ||
| B | Edmond Dantès | Avenger | |
| Antonio Salieri | Avenger | ||
| Hessian Lobo | Avenger | ||
| C | Gorgon | Avenger | |
| Dioscuri | Saber |
Omen of the Hegemon-King
One Cloaked in Death
| Rank | User | Class | Notes |
|---|---|---|---|
| A | Hessian Lobo | Avenger |
One Night Coat
| Rank | User | Class | Notes |
|---|---|---|---|
| B | Miss Crane | Caster |
One Who Crosses the Sea of Stars
| Rank | User | Class | Notes |
|---|---|---|---|
| A+ | Zeus (Lostbelt) | Ancient God, Ruler | |
| A | Poseidon (Lostbelt) | Lancer, Caster, and Assassin | |
| - | Aphrodite (Lostbelt) | Assassin | |
| Demeter (Lostbelt) | Caster |
One Who Guides
| Rank | User | Class | Notes |
|---|---|---|---|
| A | Abigail Williams (Swimsuit) | Foreigner |
One Who Swallows the Land
| Rank | User | Class | Notes |
|---|---|---|---|
| EX | BB (Swimsuit) | MoonCancer |
One's Own Magic
| Rank | User | Class | Notes |
|---|---|---|---|
| B | Artoria Caster | Caster |
Oni of Ooe, Riot
| Rank | User | Class | Notes |
|---|---|---|---|
| A+ | Ibaraki-douji | Berserker | Upgrade from Disengage (Fate/Grand Order) |
Oni's Head
| Rank | User | Class | Notes |
|---|---|---|---|
| EX | Shuten-douji | Assassin | Upgrade from Battle Continuation (Fate/Grand Order) |
Oni-kind Demon
| Rank | User | Class | Notes |
|---|---|---|---|
| A | Shuten-douji | Assassin | |
| Ibaraki-douji | Berserker | ||
| B | Tomoe Gozen | Archer |
Oni-kind Demon (Protection)
| Rank | User | Class | Notes |
|---|---|---|---|
| A | Shuten-douji | Caster |
Oni-kind Demon (Water)
| Rank | User | Class | Notes |
|---|---|---|---|
| B | Ibaraki-douji (Swimsuit) | Lancer |
Onmyoudou (Dharma)
| Rank | User | Class | Notes |
|---|---|---|---|
| A | Kiichi Hougen | Assassin |
Opening the Door of Fantasy
| Rank | User | Class | Notes |
|---|---|---|---|
| EX | Don Quixote | Lancer |
Oracle of Light
Otherworld Creation
| Rank | User | Class | Notes |
|---|---|---|---|
| EX | Kiara Sessyoin (Swimsuit) | MoonCancer |
Over the Royal Road
| Rank | User | Class | Notes |
|---|---|---|---|
| C | Charlemagne | Saber |
Overhaul
| Rank | User | Class | Notes |
|---|---|---|---|
| B | Leonardo da Vinci | Rider | In Fate/Grand Order Arcade |
| E | Leonardo da Vinci | Rider | In Fate/Grand Order |
Overload
| Rank | User | Class | Notes |
|---|---|---|---|
| C | Frankenstein | Berserker | |
| D | Charles Babbage | Caster |
Overload Revised
| Rank | User | Class | Notes |
|---|---|---|---|
| C | Mecha Eli-chan | Alter Ego | |
| Mecha Eli-chan Mk.II | Alter Ego |
| Servant Skills |
|---|
| A • B • C • D • E • F • G • H • I • J • K • L • M • N • O • P • Q • R • S • T • U • V • W • X • Y • Z • # |