Holy Devil Sister Jalan (聖魔シスター・ジャラン) is a secondary antagonist in the 1995 PC Engine fantasy RPG "Kuusou Kagaku Sekai Gulliver Boy" (空想科学世界ガリバーボーイ) by developer Hudson Soft.
Jalan is a henchwoman for the game's main antagonist Hallelujah. After the false main antagonist, Judo, is killed, Jalan and her sister Lurubu travel to Athens and become its leaders by forming a corrupt religion there.
After Lurubu is killed, Jalan taunts the hero party with a custom rap song and tells them to come to her new temple. When Gulliver and company reach the top, they find Jalan attempting to feed former members of the religion who wanted out to hungry crocodiles. The party battles her, but she uses a sneaky spell to send them back down to the surface. The party ascends the temple once more, however, and this time the villainess is killed in battle.