"Forgotten Child" is an emotional pop-hip-hop song that dives into themes of abandonment, loss, and fading memories. The track is characterized by a haunting, melancholic atmosphere with background vocals that echo the title. The lyrics and melody evoke a sense of deep sorrow and longing, while the beat blends modern hip-hop rhythms with emotive pop elements. The song's powerful chorus, accompanied by ghostly, ethereal harmonies, captures the essence of being left behind, forgotten, or lost in time.