Sir Leye

Sir Leye is one of the Temple Knights that test your skills during the Recruitment Drive quest. You must fight him as a woman, using no armour, weapons, food, prayer or potions. This is due to a famous legend stating that Sir Leye had been blessed by Saradomin himself, and that no "man" can defeat him. If your character is male, you can damage him as much as you want, but even if his life points reach zero, they will automatically reset to its maximum, making him invincible. However, if you try to kill him as a female character, his life points won't reset back, effectively killing him. After attempting to fight him about 4 times, you will no longer have to face him in the quest. You do not get any experience while fighting him.
 * Temple Knight Head Quarters

Trivia

 * If pronounced correctly, his name sounds like "Surly".
 * This is most likely a reference to the Lord of The Rings Character 'The Witch King of Angmar' who says "No man can defeat me".
 * If he was blessed by Saradomin himself, he must be very old as he must have gone back all the way to the God Wars.