介紹. Undertale Grillby is a fire elemental character from the game Undertale. In the game, he lives in Snowdin as bartender who owns the place called Grilly's. As betrayed in a lot of fan comics n' fanfictions, he's a good friend or boyfriend, a bit shy in some cases, dose not talk much until he knows the reader better, kind, smart and a gentlemanly introvert