Sir Percival

Sir Percival (パーシヴァル Pāshivaru) is a doppelgänger of Blaze the Cat from the world of Sonic and the Black Knight. Despite being female, Percival is entitled "Sir" along with the other Knights of the Round Table. She is the only female member of the Knights of the Round Table, and is known as the Knight of the Grail. She wields the sacred sword Laevatein, which appears to be a rapier. Using her royal powers, Percival can surround herself in flames during combat. Percival is permanently set to Cavalier Style.

History
Percival, along with her fellow knights, Lancelot and Gawain, was sent by King Arthur to eliminate Sonic the Hedgehog when he arrived into their world. Percival was the last knight Sonic fought. After their fight, she fell from a high cliff, and Sonic and Caliburn saved her in time. She was then impressed by Sonic's kindness, and blushed at his chivalry. Sonic's defeat of Percival is what finally earned him Caliburn's respect and the official title of "Knight of the Wind".

After King Arthur turned out to be an illusion created by Merlin years ago and that it was all a plot orchestrated by Merlina, Percival went off to put her sword in the shrine. She thought Sonic was kidding at first when he explained his plan, but when she saw he meant what he said, she bid him good luck. After the four swords formed a barrier around the castle and Sonic defeated Merlina, Caliburn revealed that Sonic was the true King Arthur of this world, and Percival, along with Gawain and Lancelot, bowed before Sonic before the hedgehog went back to his own world.

Gameplay
Sir Percival's gameplay in Sonic and the Black Knight is quite different from Sonic's gameplay. Unlike Sonic or Lancelot, she has two jumps, of which the first is used as a homing attack. Her aerial attack can be used to stay in the air for a longer time, as it sends her straight forward without losing height. The downside of this however is, that her aerial attack can't be used as effectively as Sonic's or Lancelot's. Her ground-based attacks make her speed from enemy to enemy. In her variation of the Soul Surge, she covers herself with fire and is freely controllable. This is very useful when fighting against multiple enemies at the same time. She is a Cavalier-style character.

Just as Lancelot and Gawain she can only be used in the levels Knight's Passage, Shrouded Forest, Great Megalith, The Cauldron and Dragon's Lair.

King Arthur
Percival served King Arthur without question, after he is revealed to be a fake, she was left in shock, just like the rest of the Knights.

Sir Lancelot
Percival trusts Lancelot, as he is the strongest and the (presumed leader) of the Knights of the Round Table.

Sir Gawain
The two don't interact through the game.

Sir Galahad
According to the Arthurian legends, Galahad and Percival are companions. The coincidence lies in the fact that Silver and Blaze were companions in Sonic 06 and Silver and Blaze are playing the roles of Percival (Blaze) and Galahad (Silver). This could possibly be the reason that Silver and Blaze were chosen to play those roles in Sonic and the Black Knight.

Sir Lamorak
They don't interact.

Sonic the Hedgehog
She asks about Sonic's name and master Sonic tells her he has no master "except the wind that blow's free". She is the first person to call Sonic, "Sir Sonic, Knight of the Wind". After Sonic beats her, Percival falls off a ledge, Sonic saves her, (It's unknown why Sonic saves her, either for her sword, or just to save her) Sonic tell her that whim is his "other master" she blushes after Sonic says that (And Caliburn's insult), it's assumed she has a crush on Sonic, when Gawain was about to question Sonic after he came back with the Scabbard, she tells Gawain to "Wait", she shown concern for Sonic during his battle with Merlina.

Quotes
"Without loyalty to the king, we are nothing!" - Percival when Gawain continues to question King Arthur.

"I am Percival, Knight of the Round Table, servant of King Arthur. State your name and your master, Sir!" - Sir Percival to Sonic the Hedgehog.

"Now, I shall test your skills, Sir Knight!" - In the beginning of battling in Sonic & the black knight.

"Impressive, O Knight of the Wind." - While fighting Sonic in Sonic & the Black Knight.

"Let us battle in honor!" - Sir Percival after being selected in multiplayer.

"As you wish." - Sir Percival when selected in Sonic and the Black Knight Battle Mode.

"A fine weapon." - Sir Percival when selected in Sonic and the Black Kight multiplayer.

"Not bad. But not good enough." - Sir Percival after winning a battle in Sonic and the Black Knight.

"A quite obvious outcome." - Sir Percival after winning a battle in Sonic and the Black Knight.

"A most worthy choice." - Sir Percival after selected in Sonic and the Black Knight Battle mode.

"What the?!" - After getting one star for a mission in adventure mode.

"B-But... How did you?" - After being defeated by Sonic.

"I shall withdraw..." Percival after failing a mission.

"''Well done, Sir Sonic!" ''Sir Percival about to fall into the lava after being defeated by Sonic.

"Very well, Sonic, Knight of the Wind! Prepare...for battle!" Percival about to fight Sonic.

''"Done with nary a bit of trouble." ''-After receiving four Mastery Stars in a mission.

"I will not be defeated."- When selected in Battle Mode.

"Why? Why did you-?" - Sir Percival when saved by Sonic after their fight.

"Have you made preparations?"- When accepted as character to be played in Battle Mode.

"A performance, befitting a knight!"-When getting three Mastery Stars in Adventure mode.

"Does the Knight of the Wind always run like this?"-During the "Reach the Goal" mission in the Shrouded Forest.

"A dragon? Finally, a foe worthy of a Knight of the Round Table."-Percival when beginning to fight the dragon.

"Very well. The fiend will get a fight if it so wishes."- While battling The Dragon during the Dragon Slayer challenge.

"For the kingdom and its people!"-Percival when she retrieves her sword.

"Surely you jest!?"-Percival when Sonic explains his plan to stop Merlina.

"Fair thee well, we too shall fulfill our appointed task"- When Sonic appoints her for a task to stop Merlina.

"Sir Sonic, you have done enough!" Percival when Sonic is severly beaten by Merlina.

Real world background
In the Arthurian legends, Sir Percival was a (male) Knight of the Round Table, most famous for his involvement in the quest for the Holy Grail. He was tied to the Grail legend in the earliest Arthur stories, before later legends made Sir Galahad's role more prominent. He was the son of King Pellinore, and thus the brother of Sir Lamorak.

It's also mentioned in legends that Sir Percival did not wield a sword, but an unnamed lance. The sword Laevatein, also known as the flaming sword "Laevateinn", "Wounding Wand", "Staff of Destruction", or "Damaging Twig" was a Norse weapon that made its wielder invincible in battle, could fight without being held and was forged for the hand of a god. Mortals that dare touched the sword were met with an unpleasant fate.

Trivia

 * Since Sir Percival is modelled after Blaze the Cat, and hence female, many fans believed that she should have been referred to as "Dame Percival". However, "Sir" is a title bestowed on all knights regardless of gender, whereas "Dame" refers only to female knights within the Orders of Chivalry.
 * Percival is the only playable character in Adventure Mode to not use a sword to climb up a wall nor use one to slow down the drop; instead, she runs along the walls, only stabbing her sword into a wall to change direction or stay in place. To go down the wall, she simply falls within stabbing distance next to it. (The real Blaze has not yet demonstrated an ability to walk on walls.)
 * She is the only playable character in Adventure Mode whose Soul Surge does not create a targeting reticule.
 * Likewise, she is the only playable Adventure Mode character whose Soul Surge allows her to move freely, instead of either standing still and throwing a weapon or charging directly at the enemy for a powerful strike.
 * Percival's body armor resembles Blaze's purple coat.
 * Percival is the only playable in adventure mode to double-jump (only if there are no enemies present).
 * Percival's character type is Cavalier, a speed-type style. Blaze is also classified as a Speed-type character.
 * Percival is the only Knight of the Round Table besides Sonic to hold her blade normally.
 * Percival's theme is the Vela Nova song from Sonic Rush. Specifically, this version was an extra track in the game soundtrack. Despite being her theme, a different song of unknown origin is played during her encounter with Sonic.
 * When Percival performs her Tornado/Soul Surge move, her tornado looks more like its made out of dust than just fire, so it's rather possible that Percival doesn't have the same level of Pyrokinesis like her Counterpart Blaze does.
 * Percival's final weapon, Joyeuse, was once used as the name for Lancelot's sword in the story, "The Once and Future King". The sword even appears in the Castlevania series.
 * Percival has a blue gem on her helmet in the same place that Blaze has her red jewel on her forehead.
 * Percival is the first and only knight to show great respect for Sonic as being the first to call him, Sir Sonic Knight of the Wind, and still refers to him as Sir Sonic while the others just call him Sonic.
 * Percival is far more level-headed than Blaze and not as easy to anger.