Cetrion du Olsterio

Cetrion du Olsterio (セトリオン・ドゥ・オルステリオ, Setorion du Orusuterio), is a character in the "Skeleton Knight in Another World" series. He is one of the three royal generals of Rhoden Kingdom and the heir to the Olsterio Dukedom. Later, after the assassination of Dakares and his father Maldoira, he becomes the Duke of Olsterio Dukedom.

Appearance
A brawny man in his thirties, who usually wears the lieutenant general's uniform. He supposedly looks like a younger version of his father, Maldoira.

Personality
Cetrion appears to have a more optimistic attitude when situations go wrong.

Background
Cetrion was the heir of the Olsterio family and served under his father in the third army as a lieutenant general. Like his father he served as a vassal to Second Prince Dakares Ciciay Karlon Rhoden Vetran and his faction. However this was a ruse as his true loyalties laid with First Prince Sekt Rondahl Karlon Rhoden Sahdiay.

Light Novel Volume 01
Dakares learning the death of Tryton du Diento who was his biggest financial backer in his bid for the throne had a private meeting with Cetrion and his father. To prevent their dealings in Diento being exposed, his father arranges for the new lord Orhevo to be silenced. Due to the inconsistent events in Diento, from the liberation of beastmen, to the murder of marquis, and the missing funds for Dakares's faction, Cetrion father believed that it was a plot by Prince Sekt to weaken Dakares. Prince Dakaras was more inclined to believe his vassal, and to prevent Sekt from gaining the upper hand he ordered Cetrion to begin his preparations in Houvan.

Light Novel Volume 02
The plans in Houvan turned out to be a plot to conspire with the reigning lord. With his help and  the aid of both Maldoira and Cetrion the plan was to murder Prince Sekt at the territory. Those plans unfortunately ended in failure as a revolt occurred at Houvan. The contingent led by the Olsterios was delayed by a pack of Haunted Wolves. Furthermore when they arrived at Houvan they found the territory in chaos from the rebelling townsfolk which led death of another of Count Fulish du Houvan. Though Dakares forces arrived to Houvan late, Cetrion believed that their lateness was fortunate as any early they would have been caught in the rebellion. The Lieutenant General positive spin on the situation was not appreciated by Dakares. Before the could begin their next plan to eliminate Sekt, Cetrion received urgent news from a soldier that the Etzat Market was under siege. Maldoira went out to lead his men to suppress the attack. leaving behind his son and the prince. After he left, Cetrion told the prince that a report came in that the elves may have been in volved in the Houvan incident and that the attack on the market may also be their doing. He also reported that it seemed to line up as Marquis Diento held an elf captive before he vanished and Count Houvan had recently purchased an elf before the revolt. This painted a picture that the elves were after Dakares which agitated the prince but insisted that he was safe in the royal palace. However Cetrion warned him that it still could be the work of a noble within their ranks, and given the danger recommended that the Second Prince lay low. For the prince's protection, Cetrion had prepared a place for him which Dakares accepted.

On the carriage to their destination they were stopped and all of Dakares royal guards were killed. Cetrion in the carriage with Dakares then showed his true colors by embedding his sword into the prince. Later he was greeted by the mastermind of Dakares death, Prince Sekt who Cetrion held his true allegiance to. Cetrion commented on how impressed he was that Sekt managed to organize Dakares's assassination by using the attack on the slave market. Not only that its revealed that Cetrion was involved with Sekt in sowing seeds of to dissent in Houvan and plotted Yuriarna's death. The two also spoke of the good fortune that the Haunted Wolves eliminated the priest that they colluded with on Sekt's sister's assassination. All that was left was to make it appear that Dakares was involved in Yuriarna's murder by planting her necklace on his corpse and to take care of Maldoira. Sadly the last task would be left to Cetrion, which Sekt apologized for, though the traitorous son felt no regrets. Before they proceeded with the next step of the plan, to make it appear that Dakares attempted to also murder Sekta and was killed in self-defense, Cetrion willingly stabbed his prince in the arm.

The lieutenant general then hurried with his men to go to the Etzat Market to deal with the beastmen.

Abilities and Powers
Cetrion was formerly a scion of his the Olsterio family. While he was just a lieutenant general, after murdering his father, he inherited not only the latter's army, duties but also title of nobility.

Maldoira du Olsterio
Maldoira is the father of Cetrion and was his second in command of the Third Royal Army. But despite the familial relation, Cetrion saw his father a foolish for aligning himself with the hegemony of the east rather than to his homeland. Thus he was more than willing to turn against him, as his father sullied their forefathers legacy.

Sekt Rondahl Karlon Rhoden Sahdiay
Cetrion true loyalties laid with the First Prince as the prince rather than acting as a pawn to the Great West Revlon Empire and Holy East Revlon Empire sought to play them to prevent the Kingdom from being embroiled in their territorial squabbles.