Ruvellis Kamaludin Shana Castina

 is the Crown Prince of the Castina Empire and heir to the throne.

Personality
His personality is usually misunderstood because of his past. He is a quiet and a bit cold at first, yet kind hearted person. He only believes In true love not arranged marriage. This is the cause of his misunderstood hatred towards Aristia.

Appearance
Ruvellis has dark blue hair, his bangs parted to the side, somewhat covering his blue eyes. He is tall and very handsome, and wears elegant royal outfits.

History
In the first timeline, he was cold towards Aristia for fairly unknown reasons. He never showed any love and affection to Aristia no matter how hard she tried to earn it. Eventually when Jieun came into the world, his love and devotion was given to her. Though in reality, he did love her in the first timeline.

Relationships
Aristia la Monique - In both timelines, Aristia and Ruvellis have been betrothed since her birth. In youth, he was constantly compared to Aristia. Combined with her apparent apathy towards others' praise and admiration of her skills, he came to view her with great dislike and jealousy. When Jieun appeared, Aristia instead became his second wife and first Queen of the Castina empire. Their relationship had been strained, with few notably friendly interactions. His cold and abusive treatment towards Aristia traumatized her, later carrying this trauma into her second life.

In the second timeline, Ruvellis initially holds his dislike towards her, but eventually changes his opinion during their interactions with one another. Later developing romantic feelings for her, he tries to further secure her position as his fiancée and future Empress.

Jieun - In the first timeline, Jieun was his first wife and Empress of the Castina Empire. Not much is known about the details of their relationship, but he appeared affectionate towards Jieun, favouring her over Aristia.

Mirkan lu Shana Castina - Ruvellis’s father and the 52nd Emperor of the Castina Empire. He is strict with his son, possibly because Ruvellis is his only child and heir to the throne.

Ernia de Rass - Ruvellis's paternal aunt. Similar to his father, Ernia appears strict with Ruvellis, and their overall relationship is strained.

Arkint de Rass - One of Ruvellis's most trusted subjects alongside Keirean la Monique. In the first timeline, when Ruvellis lost him, Keirean, and Ruth de Verita, he couldn't find anyone else to trust.

Jeremia la Monique - Mother of Aristia and wife of Keirean la Monique. Jeremia had a close relationship with Ruvellis, who viewed her as a maternal figure.

Trivia

 * Ruvellis is five years older than Aristia and four years older than Jieun.
 * He dislikes seafood and salty food and prefers mushroom dishes and such.
 * He enjoys Bellot red wine from the year 900 and Flayer white wine from the year 928 of the Castina Imperial Calendar.
 * Ruvellis' dessert preferences is sour over sweet.
 * Only drinks chamomile tea after the sun goes down due to sleeping problems.
 * He and Aristia have three children together named Diana (who looks exactly like Aristia) and fraternal twins named Adrian and Elina and they take from both Tia and Ruve.