What is grillby?

Grillby is a character from the popular video game "Undertale." He is a bartender and the owner of the local restaurant and pub in the game's setting, the Underground. Grillby is known for his fiery appearance, as he is made entirely of flames, and his kind, calm, and reserved personality. He is often described as being a good listener and friend to the other characters in "Undertale." Despite his status as a non-playable character, Grillby has managed to become a fan favorite among those who have played the game, with many praising his cool demeanor and mysterious persona.