The Pulse and Flow of aespa: Unpacking the Artistry of Giselle, the Group’s Main Rapped Engine

When K-pop powerhouse aespa burst onto the scene in November 2020 under SM Entertainment, they completely redefined the visual and sonic boundaries of the industry. Merging a high-concept sci-fi lore about digital alter-egos (ae) with futuristic hyperpop and heavy basslines, the quartet required a unique musical anchor.

Enter Giselle (born Aeri Uchinaga), the group’s main rapper. While aespa is globally celebrated for their powerhouse vocals and cinematic tracks, Giselle’s distinct cadence, multilingual fluidity, and rhythmic delivery provide the essential friction and edge that drive their futuristic soundscapes.

1. The Voice Behind the Edge: Defining aespa’s Sound

In a group featuring towering vocalists like Ningning and Winter, a main rapper needs a voice that cuts through complex, experimental production without getting lost. Giselle’s tone is naturally lower, richer, and possesses a sultry, effortless cool.

This texture has been vital to aespa’s iconic discography:

• The Hypnotic Cadence: In breakout hits like Next Level and Savage, Giselle balances the chaotic, shifting tempos with grounded, rhythmic delivery.
• Linguistic Versatility: Growing up multilingual (fluent in English, Japanese, and Korean), Giselle weaves English verses and phrasings into tracks with a native fluidity that expands aespa’s global appeal. Her delivery style brings an authentic western-hip-hop-inspired groove that acts as a structural bridge in complex songs like Black Mamba and Drama.

2. From Secret Trainee to Global Main Rapper

Giselle’s journey to the main rapper position is uniquely fast-paced. Having trained for only about 11 months—one of the shortest training periods for an SM Entertainment debutant in recent memory—she proved her raw talent early on.