Cain Roscente

Cain is a supporting character in the series "The Villainess Reverses the Hourglass" and the older brother of both Aria and Mielle Roscente. In the original timeline, Cain is the one who executes Aria.

About
Cain is the son of Count Roscente and the older brother of Mielle Roscente. After the remarriage of his father to Carin Roscente, Cain then becomes the older step-brother of the series' protagonist, Aria Roscente. His mother died when he was young after the birth of his sister, however when his father remarried, Cain was vehemently opposed to the idea, believing that having a former prostitute as a step-mother was unbecoming. This hostile and elitist nature extended to Aria, despite her being a child at the time of the remarriage. With Mielle carefully scheming and plotting the downfall of Aria, Cain notably followed Mielle's narrative, scorning Aria just like everyone else. After the failed poisoning of Mielle (whch of course was planned by herself), Cain was the one to execute Aria, triggering her special power which sent her back in time by a decade. She intends to make him pay for his actions as well.

In the revised timeline, Cain initially is the same as he was in the original timeline, keeping his distance from Aria while also seemingly disliking her and her mother due to their commoner beginnings. However Cain's attitude toward Aria shifts as she begins to change her reputation using her knowledge and memories of the original timeline. Uncomfortably, this shift in attitude appears to be based on attraction, as it is heavily implied Cain is attracted to Aria despite being his step-sister, often blushing profusely while gazing at her. Aria notices this change and finds it disgusting, but begins to use his less hostile attitude to her advantage to increase her favour in the Roscente household; following the attempted posoning of Aria by Veri (at the instruction of Emma and Mielle), Cain assists in finding Veri, and begins agreeing with her ideas and input. These actions noticeably upset Mielle.