As if Sakura's words reached him, Hellhound's tablet shone brightly through the ice. "So, not afraid of fire, is he!?" The daemon's voice called, the ice starting to crack with hot steam shooting out. The light increased until, suddenly, the entire block of ice was engulfed in flames, a large, bipedal figure becoming visible.
As the flames faded, there stood a massive, werewolf-looking man with black fur, dark red mane and wrists, curved horns, and piercing yellow eyes. "Normally, I would say flattery would get you nowhere, but his proclamation is an insult!" Hellhound bellowed, trudging towards the Masters. In the place he had been were Shuu and the Professor, thawed out and laying in a crater in the snow, a fire keeping them warm.
(It's not the best description, but what I'm visualizing for Hellhound's appearance is like the Hyrule Warriors version of Ganon, but with a wolf's head instead of a boar's head.)