Ulises O'brian

Catalina reappears with the aim of winning him back, which creates tension in their marriage.

Appearance Key Details: Occupation: Vampire scientist and inventor Inventions Formula, Vampi-Protector, Vampi-Mirror, Vampi-Camera Vampiric Power Hypnosis Family: Ana's husband, father of Daisy and Vicente Relationships: Rivalry with Catalina, distant relationship with his wife's family Personality Serious, protective, with ironic humor.

Ulises Armando O'Brian: Origin and role: Ulises Armando O'Brian is a famous vampire and renowned scientist in the Vampire World.

Inventions and contributions: Developer of the Formula, a substance that allows vampires to coexist with humans without being tempted to bite them or be affected by the sun. Creator of other vampire devices: the “Vampi Sunscreen”, the “Vampi-Mirror” and the “Vampi-Camera”, as well as a formula that transforms a human into a vampire temporarily for 24 hours.

Family and relationships: He is married to Ana McLaren, who turned him into a vampire to share eternity with him. Father of Daisy and Vicente O'Brian, who inherit some family powers. He maintains a tense relationship with his father-in-law, Count Dracula, and his sister-in-law Maria, with whom he prefers not to live.

Personal history: Ulysses was bitten and turned into a vampire approximately 300 years ago, at his own request to Ana. When Daisy suffered a serious accident at the beginning of the series, Ulysses and Ana decided to turn her into a vampire to save her life.

Personal characteristics: Brilliant and renowned scientist in his vampire world. He possesses the power of hypnosis, through which he can control the minds of others with a direct gaze. He is serious and reserved, although he displays a wry sense of humor similar to that of his daughter Daisy. He is the member of the family who always wears glasses. He is characterized as a protective and responsible father, although he shows dislike towards Max, Daisy's love interest, and instead supported his daughter's union with Mirco Vladimoff.

Conflicts and rivalries: In his past, Ulysses had a previous relationship with Catalina Vladimoff, a situation that generated jealousy and rivalry when he chose Ana, his current wife.