Grilda resembles a serpent, much like the Hydra from Greek mythology, except that it has just 3 heads. Each of the heads features a different expression; the right head looks intent, the center head appears tired, and the left head appears to be surprised. Additionally, the three heads also sport different headpieces; the left head has a small blade running along its head, the center head features a larger blade running up and along its head, and the right head features nothing. Additionally, the center head is both larger and its neck is longer then the other two. On the ends of its arms are spikes, and it has a diamond-shaped structure covering the near-tip of its tail.