Flashy VTuber Debut Stream Thumbnail

A high-energy VTuber thumbnail illustration of a smiling anime girl with {argument name="hair color" default="bright blue"} hair in a high ponytail wearing a white shirt. The background is an explosive burst of rainbow light rays and golden sparkles. A golden retro microphone sits in the bottom left. Massive, shiny 3D gold text on the left reads "{argument name="main title text" default="初配信"}". A 3D gold and blue subtitle reads "{argument name="subtitle text" default="一緒に最高の時間を！"}". An ornate blue and gold oval badge in the bottom right displays "{argument name="character name" default="エリン Erin"}". A red top-right badge reads "{argument name="badge text" default="LIVE"}".