The Viper Clan is a powerful family originating from Zenan mainland. Around 920 A.D., they explored El Nido with other colonists, eventually settling at Viper Manor and forming the Acacia Dragoons. Their descendants have led the Dragoons (though only by proving their capability in combat and administrative duties). By 1020 A.D., the remaining descendants of the Viper Clan in El Nido were Lord Viper and his daughter, Riddel. It is unknown which town on the mainland the Viper Clan originated from, or if a detachment of the family still lives on Zenan mainland in the modern era.