Pantheras Luteus

Pantheras Luteus (パンテラス・ルテウス): A leopard Unknown and the first of the Unknowns, possessing a red scarf around his neck. He targeted the entire Saeki family, killing them one by one. Mikoto Hikawa encountered the Lord after he killed the wife, sparing him as he was not his target. Hikawa took instant pursuit in G3 gear, overpowered by Luteus until Agito arrived and destroyed the Lord with his Ground Form's Rider Kick.