Undertale GUI
This resource pack was created by Mr_GaMLes and represents a cute interface design in the style of Undertale for fans of this cult game. According to the author, this is probably the first resource pack with an interface in the spirit of Undertale.

The main feature of the pack is the addition of Undertale characters, mainly Frisk and Chara, to various Minecraft interface elements. For example, the crafting table is now adorned with Frisk.
The changes only affect the visual component - gameplay mechanics remain untouched. The resource pack simply adds charming characters from Undertale to Minecraft's interface elements.
Artist Credits
Inventory/creative inventory: Pinterest = Sayani
Creative 2-3/loom: artist not found
Crafting table: artist not found
Furnace: artist not found (added heart :3)
Crafter: Peachy! (peachy_006) [YouTube]
Dispenser: Haizakura Fumiko
Shulker box: chiclyGomita (probably)
Smithing table/cartography table: artist not found
Enchanting table: yatsunote (probably)
Hopper: artist not found
Grindstone: torifalls
Chest/barrel: artist not found
Smoker: artist found but Japanese text couldn't be reproduced
Stonecutter: artist not found
Villager: kuruka_shi [Twitter/X]
Horse: artist not found
Brewing stand: original sprite from Undertale used
Blast furnace: artist not found
Anvil: artist not found