Sofia Cruz
Noun.
someone or something that is used to represent a particular quality (Cambridge Dictionary)
"[A] person of any age whose attributes or behavior are emblematic of a known cause, movement, circumstance or ideal." (Wikipedia)
IPA: ˈpoʊ.stɚ ˌtʃaɪld
"What I did next was so impulsive and dangerous I should've been named ADHD poster child of the year." (Percy Jackson, p. 164)
"Polar bears are the poster child for the impacts of climate change on species, and justifiably so." - World Wildlife Fund
"My brother is the poster child for laziness." - The Britannica Dictionary
post (n.)
"someone given prominence in certain causes" is attested by 1990, in reference to fund-raising drives for charities associated with disability, featuring child sufferers, a feature since 1930s.
Derivations: Poster Girl / Poster Boy
From: https://www.etymonline.com/search?q=poster+chilf%5Cd
Spanish: niño del cartel, niña del cartel
French: figure emblématique
Polish: plakacie
Arabic: الطفل المدلل