Adrian Rzepa, known as rekak, is a Polish-American instrumentalist, mixing, and mastering engineer. In 2024, he formed rekak with vocalist KBSH.

The duo makes Christian metalcore with a bunch of different elements from other sub-genres, most notably thall. They refer to this genre of music as ✟hall. (pronounced as thall)

In August of 2024, they released their first single, rejoice, which started gaining notoriety thanks to KingdomCore.

In October of 2024, they released their second single, testimony. Then, on November 16th, 2024, they released their debut EP, the faith EP.

Adrian is a self-taught guitarist, having already started a YouTube channel where he would upload a bunch of different guitar videos.