Not much of Grillby's personality has been shown. However, due to being made of fire, he seems terrified of water. This is shown in Undertale if Frisk interacts with him. Here, a message will pop up that says that Grillby would like to offer them a glass of water, but he doesn't dare touch that stuff.
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. Plus, in My Sunshine, Sans mentioned that him and Muffet always fight for customers, further supporting their rivalry.
Grillby is a fire 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 blobs, he did not wear them.
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 an even briefer cameo in this animation. He is seen getting ready to fight one of Bete's pink blobs in front of his restaurant, but him actually fighting it is not shown.
- In Yet Darker, Sans goes to Grillby's for a brief period of time. However, Grillby himself did not make an appearance in this episode.This is why "Yet Darker" is not listed in "History."
- Grillby currently doesn't have a voice actor.
|Human Soul Traits||DETERMINATION ♡ Justice ♡ Patience ♡ Perseverance ♡ Bravery ♡/FEAR ♡ Kindness ♡ Integrity ♡|
|Souls||Monster Soul ♡ Human Soul ♡|
|Weakened Souls||Grey Soul ♡ Empty Soul ♡|
|Combined Souls||Rainbow Soul ♡ Two-Traited Soul ♡|
|Villains||Chara Dreemurr ♡ Bête Noire/Akumu ♡ HATE ♡ Flowey the Flower ♡ Agate Lightvale ♡ Pink Blob(s) ♡|
|Main Characters||Frisk ♡ Dr. Gaster ♡ Sans ♡ Asriel Dreemurr ♡ Undyne ♡ Papyrus ♡ Jessica Grey ♡ Toriel ♡ Asgore Dreemurr ♡ Dr. Alphys ♡|
|Minor Characters||Amalgamates ♡ Mettaton ♡ Muffet ♡ Grillby ♡ Integrity|
|Side Characters||Amber Lightvale ♡ Cam ♡ Lily ♡ Robin ♡ Abigail ♡ Seth ♡ Zachary ♡ Hugo ♡ Ronan ♡|
|Background Characters||Temmie ♡ Burgerpants ♡ Jerry ♡|
|The Seven Wizards||Copper Lightvale ♡ Agate Lightvale ♡ Roy Goldburn ♡ Shane Goldburn ♡ Mila Rutrow ♡ Kody Fallenfire ♡ Rin Winterway ♡|
|Season 1||Megalomaniac ◆ Yet Darker ◆ *Determination ◆ Your Best Friend ◆ Continue ◆|
|Season 2||My Sunshine ◆ Dust ◆ Do or Die ◆ Love ◆ My Promise ◆ Game Over ◆|
|Miscellaneous||Sans vs Flowey ◆ Scared Of Me ◆ Don't forget... ◆|
|Glitchtale Origins||Glitchtale Origins... The Black Beast ◆|
|Pre-Glitchtale Battles||Chara vs Asriel ◆ The Great Human and Monster Wars ◆ Agate Lightvale vs Copper Lightvale ◆ Integrity vs Asgore ◆ Flowey vs Sans ◆|
|Season One Battles||Frisk & Chara vs Sans ◆ Gaster vs Frisk & Sans ◆ Chara vs Sans & Flowey ◆ Chara vs Omega Flowey, Sans, Frisk & Gaster ◆ Asriel vs Chara◆|
|Season Two Battles||The AMD's trap ◆ Battle on The City ◆ Gaster vs Bete Noire ◆ Undyne vs Bete Noire ◆ Frisk vs Bete Noire ◆ Asriel & Bete Noire vs Frisk, Toriel & Asgore ◆|
|Staff||Camila Cuevas ◆ NyxTheShield ◆ Strelok ◆ Veir ◆ Nevan Dove ◆ Ruddles ◆|
|Vocal Talents||Courtney (Project_SNT) ◆ KateMarie999 ◆ Lumisau ◆ Zedrin ◆ MEMJ0123 ◆|