Dennis (Hotel Transylvania)

Dennis "Denisovich" is the tritagonist of Hotel Transylvania 2. He is the half-human/half-vampire son of Jonathan and Mavis. He is also the grandson of Dracula and Martha (his maternal grandparents) as well as Mike and Linda (his paternal grandparents). Through Mavis, Dennis is also the great-grandson of Vlad (his mother's paternal grandfather).

Early life
Dennis was born a few years after the events of the first film to Johnny and Mavis and lived with them at his maternal grandfather's hotel.

As he showed a lack of vampire traits, he was raised mostly human, being fed healthy foods and taught by his parents. He often played with the Werewolf kids, and watched Kakie The Cake Monster.

Drac's Concerns
Due to his heritage and possibly his young age, Dennis shows no signs of becoming a monster much to the distress of Dracula. Dennis' lack of powers seem to be because he looks more human like his father then what he is vampire like his mother.

Monster Training Boot Camp
After Mavis and Johnny head to California to visit Dennis' paternal grandparents, Mike and Linda, Dennis is left in the care of Drac and his friends Wayne, Murray, Griffin and Frank. Though, unknown to Mavis, Drac wanting to bring out Dennis' monster genes decides to recruit his friends into putting the little boy through a monster training camp.

Vlad's Arrival
When Vlad comes to the party after being invited by Mavis, Vlad, who wanted Dennis to grow out his fangs as much as Drac would, possessed Kakie the Monster mascot during his performance to see if Dennis' fangs would pop out, but was disturbed by Dracula after Mavis knew what was going on.

Bela's Assault
Dennis finally triggered his vampire powers when he saw that Winnie was in danger, he quickly turns into a bat and fights Bela, followed by super strength and super speed and X-ray vision allowing him to be able to see that Bela's gang was coming.

Trivia

 * Dennis bears a striking resemblance to Merida's triplet brothers Harris, Hamish, and Hubert from the Disney/Pixar movie Brave.