Why not have Captain Ozlo turn nuts like Arkus and he creates a machine that is now known as Lord Vanaduke! As Vanaduke is destroyed, Ozlo comes out of the machine and says "I wanted to die in peace after that squad of soldiers got killed by a horde of tortodrones, but you, _____________,have defied my rules and destroyed Vanaduke! Now I'll have to kill you with my bare hands!".
Ozlo is a Knight with an Unknown sword that changes into what ever weapon his opponent is weak to. He, like Vanaduke is weak to piercing. He has a "Vitasuit Deluxe" as armour and an enhanced white "Spiral Sallet". He is larger than Feron. Phase 1:Ozlo will use his shield until it breaks, then you can hit him. Repeat this continuously. Phase 2: He will swing his mighty sword and run in circles at the same time, causing vibration damage. Use a gun in this phase. Phase 3: His sword will change into weapons the opponents are weak to so watch out! Note: Weapon charges is totally fast for him. He is only immune to one thing in this phase and that is the sleep vials. He will die just like a regular knight and he will drop "Almirian seal". He will also drop a "Vitasuit Deluxe."
There is already lore on Vanaduke. Also Ozlo going crazy would seriously shake up the Spiral Order.