Alastor

Appearance: Alastor is a slim, dapper sinner demon with beige-colored skin, and usually has a broad smile full of sharp, yellow teeth. He is at around the same height as his rival, Vox, with the two standing at approximately 7 feet. He sports a pinkish-red cropped, angled bob-cut with black tips at the ends and two large, black tipped tufts of hair extending from the top of his head, evoking the ears of a deer. The style has an undercut at the back, and two small black antlers protruding from the crown.

Alastor's eyes have dark-red sclera, bright-red irises and thin black pupils. His forearms and lower legs fade to dark grey, and he has red hoofed toes and red fingers.

Alastor wears a red pinstripe coat with dark-red lapels piped with white, which is ragged along the bottom hem. Underneath this he wears a bright red dress-shirt with a black cross on the chest, and long black dress pants with matching bright red cuffs. He also wears a dark-red oval-shaped monocle, rimmed with black, over his right eye.

He accessorizes with a black knotted bowtie with a bright red center, black gloves with red at the fingertips, and black pointed-toe boots with red deer hoofprints emblazoned on the soles. Alastor also carries a thin cane with a sentient vintage style microphone attached to it, which he uses to play sound effects and broadcast his voice.

When in his full demon form, Alastor's body grows larger and limbs become longer, his neck gains extra joints, and his horns grow in size. His sclera turn black with his pupils turn into the shape of radio dials. His suit and ends of his mouth also gain stitches along them.

Personality: Alastor acts friendly and nice, but he is clearly callous, sadistic, vile, ruthless and extremely violent, but otherwise his behavior, mannerisms, and even his voice are similar to an old-fashioned radio announcer; for instance, when he refers to modern television as a "picture show" and refers to Charlie as "a charming demon belle". Vaggie describes him as "a violent monster of chaos", which is why he is dangerous.

Alastor likes to showcase his power and carnage for every sinner in hell to witness, hence his title the "Radio Demon". However, he is also fully aware that there are other demons and entities that rival him in terms of power and isn't reckless.

Despite being extremely powerful, he tends to get bored and lack inspiration.

Alastor dismisses the idea that redemption is possible. Nevertheless, he still provides the hotel with a staff, and protects Charlie's business from outside threats. However, he does very little to mask his true nature and how evil he really is, even stating that, if he wanted to harm anyone in the hotel, he would've done that already. In addition, his help is for his own personal amusement rather than Charlie's idealism, or at least so he claims. He has also expressed a desire to see sinners struggle in attempts to repent for their misdeeds, only for them to repeatedly fail miserably.

He is known to be a gourmet, and as such, refuses to eat processed foods like canned meat, Easy-Mac, or ketchup. His favorite food is venison. The prequel comic shows that civilians are terrified of him; passersby avoid him when he appears, and visibly nervous merchants give him what he wants without commenting. He is also confirmed to have loved his mother dearly when he was alive, something he mentions to the Hotel Staff by saying how she used to show him how to cook.

In the series itself, Alastor shows to be sadistic, very cunning, and manipulative. While he is willing to help the Hazbin Hotel and use his power to defend it, he often acts with self-interest in mind, such as offering deals to Vaggie and Charlie for his own benefit (with Vaggie to promise that he won't have to deal with television again, and with Charlie for a single favor at a time of his choosing).

Despite his sadistic nature, Alastor does express a warmer and friendlier side towards a few others. He is good friends with Mimzy, having known her since they were both alive and even hugging her upon meeting again. He also gets along well with fellow Overlord, Rosie, with the latter even stating that Alastor has never done her wrong before. The night before the Exorcist attack, Alastor even seemed to warm up to the hotel residents and enjoyed the celebration with them.