“Yes. I, too, regretted what I had done. If my killing of Lady Mother became public, my, that is the future king of Reeve’s, reputation would be tarnished. Just when I was thinking of what I had to do, that woman appeared. She was a female mercenary, hired to guard the royal palace who happened to pass by at the time and since she had seen the murder scene I had to put the blame of the governor’s wife's murder on her, that’s all. I wanted to kill her then and there, but she managed to flee...”
—Rentzen, in a conversation with Dolmu
Rentzen (レンツェン Rentsen, fan translated as Lentzenheimer) is an enemy character from TearRing Saga: Utna Heroes Saga. He is the son of Duke Dolmu of Zemseria and the self-proclaimed rival of Runan. He is also a member of the royal family of Reeve through his mother.
During the fall of Reeve, Rentzen encourages his father to betray Reeve and seize control of Razelia as a vassal of the Zoa Empire. Following this, he was placed as an overseer of Razelia under his father's command and began ruling as an amoral tyrant. After his mother accused him of being inhuman because of his cruelty towards the Razelian citizens, he murdered her and pinned the blame on Julia, who had witnessed the crime. To cover up the murder and secure his position as the heir to the throne of Reeve, Rentzen hired Vega to hunt her down.
When Runan's army approaches Zemseria, Rentzen has a conversation with Dolmu about the murder of his mother and framing of Julia. After Prince Julius withdraws Canaan's forces from Zemseria, Rentzen also decides to leave. Before departing, he advises his father to raise the drawbridges in order to exploit Zemseria's natural defenses at the expense of his frontline soldiers.
In Map 26B, Rentzen apprehends Arkis as he attempts to flee with his fiancée, Rina. He forces Arkis to fight for him by taking Rina as a hostage. In order to provoke Runan's forces into killing Arkis, Rentzen dresses him as a Dark Soldier, hiding his face with the helmet. As Runan's army approaches Razelia, Rentzen hires Golgoda as a bodyguard and arms himself with the ☆Rukuud. He also hires a group of brigands to disguise themselves as captive maidens in order to ambush Runan's forces.
If Rentzen is challenged by Julia or Vega, they will take vengeance for his deception and claim the ☆Rukuud after his death.
Rentzen is a calm and cruel man who desires to claim the throne of Reeve as his own. He does not feel any guilt for murdering his mother, although he regrets it because it could tarnish his reputation. He is extremely envious of Runan because of his popularity both among the nobles and civilians. His hatred for Runan is his reason for encouraging Dolmu to betray Reeve.