Frisk

Frisk is a yellow-skinned human child who wears a long-sleeve light blue shirt with two magenta stripes, light blue pants (often depicted as shorts in the official Undertale merch), and red-brown shoes (usually depicted as black or in a darker tone). They have medium-length straight red-brown hair, short and choppy bangs, and a blank expression. Though Frisk does not show much expression in the overworld, NPCs often describe Frisk's expressions.[1] Just like the first human, they have no stated gender[2] and are solely referred to with "they/them" pronouns throughout the game,[3][4] or by generic terms (such as "child", "human", or "kid".)