Yes, Asura is indeed Death the Kid's older brother in the Soul Eater narrative.
The Familial Bond Between Asura and Death the Kid
The relationship between Asura, known as the Kishin, and Death the Kid, a Shinigami and the son of Death, is a pivotal element within the Soul Eater universe. Their fraternal connection plays a significant role in the series' overarching plot, particularly during their intense confrontations.
As the story unfolds, the deep familial ties between Asura and Death the Kid are explicitly revealed. This disclosure confirms Asura's status as the elder sibling. The dynamic between them is profoundly highlighted when Death the Kid, referred to as Asura's younger brother, unleashes his full power during their climactic battle, allowing him to stand as an equal against Asura. This fundamental sibling rivalry and profound bond are central to many of the series' core themes.