Monster Kid

The monster kid is a young monster in the Underground.

Appearance
The kid is a yellow monster, with a tail and spines on the back of their head. They have legs but no arms and they wear a yellow striped shirt.

Personality
The kid looks up to Undyne as a role model. They are an innocent monster who assumes the best of the protagonist.

Main Story
The kid meets the protagonist in Snowdin, pointing out how their striped shirt shows that they're a child.

The kid later sneaks out of Snowdin to explore the Waterfall, looking for Undyne. They follow the protagonist, not knowing that Undyne is searching for them as they are a human, and feel a little jealous that they receive so much attention.

Neutral Route
The kid eventually finds out that the protagonist is a human, and reluctantly considers them an enemy. They attempt to say something mean to them, but feel bad for it and begin to leave.

Just as the kid takes off, they fall and hang off a ledge. Undyne approaches and the player is given a choice:
 * Help the kid up the ledge
 * The kid defends the protagonist from Undyne, who backs off. The kid decides that they'll remain friends and leaves for home.
 * Run away from Undyne.
 * Undyne helps the kid up, who tells her that the protagonist was just going to get help from others.

No Mercy Route
The kid is warned by Undyne that the protagonist has hurt a lot of people. They approach them anyway, not believing that they would do such a thing. The protagonist silently approaches the kid with a 'weird expression'. The kid nervously stands their ground, and the protagonist eagerly enters a battle with them, declaring that they are 'in [their] way.'

The player cannot flee from the kid, but they can attack, check or spare them:
 * If the player attacks, Undyne takes the damage instead, depleting her health. The kid escapes.
 * Checking the kid suggests that they look like 'free EXP'.
 * If they spare the kid, they will say that they knew the protagoinst wasn't that bad before they leave.

Trivia

 * The kid a sister, as mentioned if you agree to say something mean to them in the neutral or pacifist route.
 * In waterfall and the wishing area, if you talk to the echo flowers, you can follow the conversation of someone and their sister. This may be Monster Kid and their sister.