Zapp Renfro (ザップ・レンフロ, Zappu Renfuro) Voiced by: Yoshimasa Hosoya (Vomic), Kazuya Nakai (Japanese); Ian Sinclair[3] (English) A hot-blooded, womanizing Libra member and master of the Big Dipper Blood-Fighting Style (斗流血法, Hikitsuboshiryū Keppō)'s Kagutsuchi branch, which allows him to manipulate his blood into blades and explosions. He is very well trained, being able to keep up with beings much faster than what the human eye can normally follow. His juvenile actions often get him and the rest of Libra into trouble. He is Leonardo's partner and despite his usual attitude, he cares about him in some way. He is always trying to defeat Klaus in a battle but is always the one to lose.
Skills and abilities
Big Dipper Blood Battle Style (斗流血法, Hikitsuboshiryū Keppō?): Kagutsuchi branch of the Big Dipper Blood Battle Style, which allows him to manipulate his blood into blades or thread, which he can then ignite to burn his opponents alive. This is called Big Dipper Blood Technique in the FUNinamtion dub.
Blade Form One, Homuramaru (刃身ノ壱·焔丸, Jinshin no Ichi, Homuramaru?, literally "Flame Round"): Zapp emits then solidifies his blood into a sword. This is called Blade One, Homuramaru in the FUNinamtion dub. Giant Serpent Halberd (大蛇薙, Orochi Nagi?): While moving at breakneck speed, Zapp slashes the opponent with the sword Homuramaru turning into a whip sword to shred the target with one strike. This is called Serpent Slayer in the FUNimation dub. Blade Form Two, Sky-Slicing Strands (刃身の式·空斬糸 , Jinshin no Shiki, Kūzanshi?): Zapp generates his blood into a web of string that can slice and ensnare opponents. Seventh Hell (七獄, Shichi Goku?): The sword transforms into a thread that restrains the target and ignites the target through the thread, resulting in a large explosion. This keeps its name in the FUNimation dub. Shining Winding Binding (赫綰縛, Kakuwanbaku?): Zapp uses the Sky-Slicing Strands to create a net that's capable of catching large objects. This keeps its name in the FUNimation dub. Blade Form Four, Crimson Bone-Eaten (刃身ノ四・紅蓮骨喰, Jishin no Yon, Guren Honebami?): Zapp emits then solidifies his blood into a large, jagged-edged sword. Blade Form Six, Crimson Piercer (刃身ノ六・紅天突, Jishin no Roku, Benitentsuki?) Crimson Orb-Weaver (紅絡新婦, Kurenai Jorogumo?): A technique which creates a net made of blood.