Like Ludo and the other members of their family, Dennis is a bird-like monster with green feathers. Unlike Ludo, however, Dennis is very tall, standing even taller than Queen Butterfly, with long, feathered arms. He has a perfectly round head, a ring-shaped patch of blue hair that resembles a kappa's water dish, yellow eyes, and a dark green beak with white fangs. He wears a white tank top and brown pants.
In a stark contrast to Ludo, Dennis speaks with a meek, high-pitched voice. While his mother and father speak of Ludo with shame and disappointment, Dennis cares deeply about Ludo and his well-being, so much so that he regularly observes his older brother from a distance.
Dennis first appears in "Face the Music" when Queen Butterfly visits his family's dilapidated manor in Mewni's Forest of Certain Death, asking about Ludo's whereabouts. After Queen Moon leaves, Dennis follows and approaches her, explaining that Ludo is not well and needs help. When asked if he knows where Ludo is, Dennis offers to fly Moon to Ludo's location.
Dennis takes Moon to an abandoned monster temple in the mountains, but they quickly leave once Moon sees that Ludo is in possession of a magic wand. Upon returning to the Forest of Certain Death, Dennis asks Moon if she can help Ludo, and Moon says she'll do what she can.
In "Starcrushed", Dennis is briefly mentioned by Moon, who tells Ludo that he misses his big brother and is worried about him.
Dennis's relationship with Ludo is suggested to be very warm and friendly, unlike Ludo's relationship with the rest of his family. Dennis expresses concern and worry for Ludo in "Face the Music", and Ludo asks Queen Moon how Dennis is doing in "Starcrushed", suggesting that they are (or were previously) very close.
Powers and abilities
- Flight: With his large feathered arms, Dennis is capable of flying through the sky like a bird, even while carrying at least one person on his back.
- Dennis is voiced by Atticus Shaffer, best known for playing Brick Heck on the ABC sitcom The Middle. Eden Sher, the voice of Star Butterfly, is one of his co-stars on The Middle.
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 Season 2, episode 40: "Face the Music"
- ↑ Season 2, episode 41: "Starcrushed"
- ↑ Ludo in "The Hard Way": "You know what my dad taught me about making my way in the world? Nothing! Zip! I was one egg out of fifty!"