/* PersonajeResponse.cs */
[Serializable]
struct PersonajesResponse {
  public Personaje[] data;
}

/* Personaje.cs */
[Serializable]
struct Personaje {
  public Pelo pelo;
  public Ojos ojos;
  public Piel piel;
}

/* Pelo.cs */
[Serializable]
struct Pelo {
  public int id;
  public string color;
}

/* Ojos.cs */
[Serializable]
struct Ojos {
  public int id;
  public string color;
}

/* Piel */
[Serializable]
struct Piel {
  public int id;
  public string color;
}

var rawJson = @"{
 "data": [{
     "pelo": {
         "id": 1,
         "color": "#ff0",
      },
      "ojos": {
          "id": 1,
          "color": "#000",
      },
      "piel": {
          "id": 1,
          "color": #ffc",
      }
  }]
}";

var response = JsonUtility.FromJson<PersonajesResponse>(rawJson);