Percival is a minor character from the 1985 animated series She-Ra: Princess of Power.
She-Ra: Princess of Power
Percival was a member of the race of Magicats who lived in the underground city of Halfmoon. The Queen of the Magicats ordered her people to flee to the underground city when the Evil Horde began it's occupasion of Etheria. She herself was the last of her kind to venture outside of their rocky hiding place to attempt to rescue fellow Magicats who had been captured.
Meanwhile, the Magicats in Halfmoon kept hoping for their Queen to return. When Catra stumbled upon the underground city, it was quite simple for her to pretend to be the Queen. Luckily for the Magicats, She-Ra found herself underground at the same time and managed to convince Percival of the truth.
Using the magic inherent to all Magicats, the Queen's loyal subject Percival disguised himself as Hordak and ordered the Queen to be transported back to the Etherian mainland. After the Horde Troopers that brought the caged queen were sent away, Persival revealed his true self and the Queen was at last free once more, able to return to her underground kingdom.