Sir Galleth Cooper is one of Sly Cooper's ancestors and a playable character in Sly Cooper: Thieves in Time.
Sir Galleth was from 13th century medieval England, where he was an honorable thief and even had his own group called Knights of the Cooper Order. In Thieves in Time, he is shown to be not as skilled as the Thievius Raccoonus describes him, as his overconfidence led to him being captured by the Black Knight. He created the Wall Hook move, even refining it to his own version called Catapult Crash.
When Sly and the gang arrive in Medieval England, they find that Sir Galleth is locked up in one of the circus tents, which was due to his overconfidence. He is rescued by Sly and joins them in eventually taking down the Black Knight. After helping them out one last time in Le Paradox's Blimp, he returns to his time to form the Knights of the Cooper Order, as well as becoming a successful actor.
