Brief:

Caesario, commonly nicknamed Czar, was a mercenary that joined the army under a contract with one of the Commanders. Particularly powerful for his race, he formerly lived in the cold mountains of Zerneluse Valley with his wolf spirit, Opi. At birth, he was a special case due to his mother having been named one of the Nine Komanderi before she knew she was expecting him. So, this led to him being abnormally stronger, having inherited a slice of the Chaos Komanderi's power, but not completely stealing it. His Demonic shares the aspect of it, which leads to him commonly working alone due to the risk of death for others being near being too high to be safe.

He was one of the few who was in Accalia's inner circle, but was left the rest of the Seven after the war ended.

Detailed:

Born between a former Komanderi and a Baron's son, Caesario was raised by his father in the harsh environment of Zarneluse Valley in the northernmost part of Delune-Vitar. Due to the towns and villages surrounding the valley speaking mostly Puril, he grew up speaking both the Demon's and Divine's languages rather than his own race's and common (he still lacks a lot of fluency in it, but knows enough to hold a basic conversation now).

After his father passed, he kept away from LowGround and stayed in the north where he took jobs of eliminating light beasts and stray Divine camps that wandered to close to the towns for a bit of money. Accalia happened to meet him while tracking down the same camp he took out, then recieved a letter from one of the towns he frequents often from Commander Elekiever to hire him for the Legions.

After some thought, he sent a letter in reply that he'll be out after the expected storm cleared, then found himself running into Accalia a second time when she was teleported to the Valley with a few Divines. Caesario cleared those who remained out and tended to the unconscious apprentice's wounds. About a weeks worth of waiting and traveling passed before they reached the Demon Realm, then he proceeded to house with Accalia for a few days and remained in contact with her before he was sent out on his first mission.

Rather than being a full-fledged soldier, he was sent out on solo missions in order to remove the risk of Opi undesirably hurting another squad member. This went on for months until Accalia's capture when Commander Elekiever was killed in action, then his dispatcher was changed to a different and more ignorant Commander Phaeth. She sent him out with an entire squad to a Divine camp that was way to large for the party to take down, and Opi made it a massacre on both sides. Being the lone survivor, Caesario ran back to his home in the Valley where he knew he couldn't be reached and was announced exiled a week later since none of the soldiers found his body and Opi's claws marked everyone.

Since then, he lived in solitude for a couple years and relied on his own ability to survive on his own in the Valley and limited his contact with the towns in case the Demon Lord had a bounty. Nothing much really happened during that time for him until Accalia showed up at his home to request for his help to stop the war once and for all. He never associated with the Seven directly, but he remained in MidGround when all of the Divines and other Demons vanished from the world. Due to being immortal, he parted ways with the rest of the Seven after he recovered from his injuries he suffered from in battle and has never stayed in the same place since.