Character: ice-e

In Undertale, Monster Kidz Word Search is a word search puzzle that Sans sets up to trap the protagonist. The word search contains a bear-faced ice cube named Ice-E, which has been deemed the "greatest and most popular Undertale character" by Toby Fox, and can contain a bear-faced snowman named "Nightmare" with certain fun values. If the protagonist attempts to leave this puzzle, Papyrus will complain to Sans that he had made the puzzle too hard.

In Deltarune, a pizza restaurant known as ICE-E's P"E"ZZA is located in Hometown. The employees are all dressed in Ice-E mascot suits, and Burgerpants, returning from Undertale, is the only employee ever seen without the mascot head, which he takes off when Kris talks to him. In Chapter 1, it cannot be entered as none of the employees are inside the building. Three of them (including Burgerpants) are around the exterior of the building. A fourth employee, only known as "The Warrior," is in the hospital due to "pizza-related injuries," according to Burgerpants.

This tag implicates undertale_(series) (learn more).