Undertale is a popular indie role-playing game created by Toby Fox. Toriel and Sans are two main characters in the game. Toriel is a maternal monster who cares for the main character and accompanies them at the beginning of the game. She is warm, kind, protective, and possesses a strong maternal instinct towards the main character. Sans, on the other hand, is a laid-back skeleton who loves puns and jokes. Despite his relaxed demeanor, he is one of the most powerful characters in the game and plays a significant role in the storyline. Both Toriel and Sans have become beloved characters among Undertale fans due to their unique personalities and memorable interactions with the player.