Very little is known of Grillby's personality, however, due to being made of fire, he seems to be naturally terrified of water, as shown in Undertale if Frisk interacts with him. Here, a message will pop up that says "Grillby said that he'd offer you a glass of water, but he doesn't touch the stuff."
Nevertheless, Grillby is shown to be competitive, since he works tirelessly all day in order to keep his diner as the most popular in town. Grillby seems to not like Muffet, mentioned in My Sunshine, Sans said that he and Muffet always fight for customers, further supporting their rivalry.
Grillby is a fire-like monster that has glasses. He wears a black long sleeve uniform that has a white collar, a small grey bow-tie, and a few black buttons. During My Sunshine, he was seen wearing white gloves. However, in Love Part 1, when he was getting ready to fight some of Bete's pink creatures, he did not wear them.
Powers and Abilities
- Fire Manipulation: Since Grillby is made of fire, he's capable of shooting balls of fire as seen in Game Over Part 2.
Grillby makes a cameo in this episode. He is seen serving a burger to someone in front of his restaurant, vying desperately, and relentlessly, for customers. He soon looks angrily at Muffet upon realizing she is doing the same to get customers.
Grillby makes a brief cameo, getting ready to fight one of Bete's pink creatures in front of his restaurant, though him fighting it is not shown.
- In Yet Darker, Sans heads over to Grillby's for a brief period of time. However, Grillby himself did not make an appearance in this episode.
- Grillby currently doesn't have a voice actor.
|Villains||HATE ♡ Chara ♡ Agate Lightvale ♡ Bête Noire ♡|
|Main Characters||Frisk ♡ Gaster ♡ Sans ♡ Flowey ♡/Asriel ♡ Undyne ♡ Papyrus ♡ Toriel ♡ Asgore ♡ Alphys ♡ Mettaton ♡|
|Side Characters||Jessica Grey ♡ Ellie Winterway ♡ Amber Lightvale ♡ Cam ♡ Lily ♡ Robin ♡ Abigail ♡ Seth ♡ Zachary ♡ Hugo ♡ Ronan Cass ♡ Rave Rutrow ♡ Isabelle ♡ Miasma ♡ Jessee Krovor ♡ Amai Yuki ♡ Kanashi Fukitsu ♡ Kennari ♡ Grace Rutrow ♡ Adrian Garza ♡|
|Background Characters||Temmie ♡ Burgerpants ♡ Jerry ♡ Grillby ♡ Muffet ♡ Amalgamates ♡ Alina ♡ Noah Rutrow ♡ Akumu/Pink Creature(s)/Kumuzilla ♡ Zoe Phenix ♡ Jun Youmei ♡|
|The Seven Wizards||Copper Lightvale ♡ Agate Lightvale ♡ Roy Goldburn ♡ Shane Goldburn ♡ Mila Rutrow ♡ Kody Fallenfire ♡ Rin Winterway ♡|