Heats Flamesman is a minor character in Undertale, appearing in Hotland.
Profile
Appearance

Heats Flamesman is a small, flame-headed monster. A yellow star is present on their chest.
Personality

Heats Flamesman desperately wants their name to be remembered and expresses shock if the protagonist either forgets or remembers it.
Main Story
Neutral Route

Heats Flamesman first appears in front of elevator R2. They ask the protagonist to remember their name.

They are later found in front of elevator R3 and ask if the protagonist remembered their name. Regardless of the protagonist's answer, they suddenly express shock, claiming to have been easily defeated. Speaking to them again after the protagonist tells them that they remembered their name earns the response "I'll always remember that you remembered!" Likewise, if the protagonist forgot, they respond "I'll never forget that you forgot!"

Heats Flamesman disappears from their spot if Mettaton is killed.
True Pacifist Route

At the end of the True Pacifist Route, Heats Flamesman remains in front of elevator R3. They simply ask if the protagonist wants a rematch, still wearing a shocked expression.
Cameos

In Deltarune, a character named Hots Fireguy is the author of a book in Hometown's Library. They ask the reader to remember their name in the same manner as Heats Flamesman.
Gallery

Heats Flamesman's official tarot card as Major Arcana XX, "Judgement". Note the name is wrong.
Heats Flamesman's official tarot card as Major Arcana XX, "Judgement". Note the name is wrong.