Zapp Renfro is a fiery and impulsive character from the anime series Kekkai Sensen, also known as Blood Blockade Battlefront. He is a member of the secret organization Libra, which is tasked with maintaining balance and order in the chaotic city of Hellsalem's Lot. Zapp is a master of the Big Dipper Blood Fighting Style, which allows him to manipulate his blood to create powerful weapons and attacks. Despite his brash demeanor and reckless behavior, he is a loyal friend and a formidable ally in battle.