Benigumo belong to Shinnosuke Anzai.
Byakuren No Fang
Benigumo was raised by Shinnosuke Anzai. He never felt any love, but was merely a toll to kill Zero with. He was trained only to be swift and bite hard. At his first match with Zero he loses. He bites on to Zero's neck to kill him, but Zero does the same. In the end, Benigumo has to release his grip and is defeated.