"Where there is light, shadows lurk and fear reigns... yet by the blade of Knights, mankind was given hope..."
Suzumura Rei, aka Zero is the Silver Makai Knight of the West. He was an orphan and the knight that wielded The Silver Fang armor at that time took pity on him and raised Rei as his son. His father (the house butler) was actually an old dying Makai Knight who never had kids so Rei was trained by him to inherit his title and start his own lineage, continuing the tradition of guardianship. Though trained as a Makai Knight, Rei didn't have the tenacity nor murderous intent to be a true warrior. One fateful night his lover Shizuka and his father were killed by a warrior who suspiciously resembled GARO. Since then he renamed himself as ZERO and has a vengeful spirit to get back the Makai Knight that took his loved ones away. ( original from wikipedia: [link]
<--Garo, the golden fanged wolf