Basic vampire abilities
He, Makenna and Renata came from a human and vampire-friendly Maltese family that worked together to preserve their family line. He was converted into a vampire around 400 BC. Unlike other vampires, Luca did not leave his family behind and continued to look after his family's prosperity and safety. He would only transform those that are gifted while the rest of his descendants live in peace. With a vampire on their side, the family prospered greatly. Everyone in the family was in on the secret and thought of Luca as a kind of personal saint. One of Luca's relatives named Jericho joined him, but later chose to go on his own rather than staying a part of the family, which disappointed Luca. He then looked for another family member to help him preserve the family line, and turned a few more of his relatives into vampires, Courtenay and another relative of which became his constant companions while several others left the family to start their new life.
When the Volturi came to offer Renata, one of Luca's descendants, a place within the guard, Luca encouraged her to take up on their offer in order to avoid conflict; he was in enough trouble as it was due to his family's knowledge of real vampires.
Later in 1946, Makenna, one of the chosen ones, fell in love with a man named Charles, Luca reasoned that she could indeed abandon her destiny to be with him as a human, but she decided to follow it through anyway. A few years later, Charles joined their family as a vampire. Makenna changed him personally, knowing Luca would never change someone outside of the family. Makenna's brother had a son, named Cova, a few years after Makenna left the family. After Cova's 20th birthday, Luca turned him, Cova was granted the power of Danger Sensory.
From description, Luca seems to be a generous, smart, devotive and family-motivated person. Though he chooses one gifted family member to be changed into a vampire every few centuries, he would respect that chosen one's wishes if he/she chooses otherwise. He dedicates his entire existence to providing for his family and maintaining the thin secrecy of vampirism. As a vampire, he drink human blood, but he does a different way rather then killing. This is how he teaches his coven members and descendants how to do it while some chose to be vegetarians or half-vegetarians.