Dennis is a small boy with curly, striking red hair and blue eyes, a combination of genes he inherited from both his parents. He is dressed in a sports jersey (with the number "4" on it in Hotel Transylvania 2) and shorts similar to Johnny. According to creators, Dennis inherited Mavis's blue eyes and pale skin and Johnny's bright hair.

Denisovich "Dennis" Loughran is a major character in the Hotel Transylvania franchise. 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).

Dennis "Denisovich" Dracula-Loughran is a major character in the Hotel Transylvania film series. He is the main protagonist of Hotel Transylvania 2, a major character in Hotel Transylvania 3: Summer Vacation, and a minor character in Hotel Transylvania: Transformania.

Denisovich "Dennis" Loughran is a major character in the Hotel Transylvania franchise. 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).

Dennis "Denisovich" Dracula-Loughran is the half-human/half-vampire son of Jonathan and Mavis and one of the main protagonists (alongside Peter B. Parker) in Hotel Transylvania 2. He is the grandson of Dracula and Martha (his maternal grandparents) …

In Hotel Transylvania 3: Summer Vacation, Dennis sneaks Tinkles on the vacation that Mavis plans for Drac. Tinkles later helps in the resistance against Abraham Van Helsing when he takes control of the Kraken. In Hotel Transylvania: Transformania, Tinkles was affected by the Monstrification Ray where it briefly turned him into a normal puppy.

He is one of the main protagonists (alongside Peter B. Parker) of Hotel Transylvania 2, a major character in Hotel Transylvania 3: Summer Vacation and a minor character in Hotel Transylvania: Transformania. He is the half-human/half-vampire son of Jonathan and Mavis.

Dennis (known as Vampire-Spider-Boy) is a major character in the Hotel Transylvania film series. He is the main protagonist of Hotel Transylvania 2, and the tritagonist in Hotel Transylvania 3: Summer Vacation.

Dennis (known as Dennis Dracula-Loughran and the alter-ego Vampire-Spider Boy) is a major character in the Hotel Transylvania film series. He is one of the main protagonists (alongside Peter B. Parker) of Hotel Transylvania 2, the supporting character in Hotel Transylvania 3: Summer Vacation, a...

Dennis Dracula-Loughran is a major character in the Hotel Transylvania film series, serving as the main protagonist of Hotel Transylvania 2, a major character in Hotel Transylvania 3: Summer Vacation, and a minor character in Hotel Transylvania: Transformania.