Greñas is a black haired Bearded Collie. He is owned by Carlos Antonio. His first appearance was in Case #1 The Case of the Missing Dog.
He appears in cases 1-10, and is mentioned in 29. He is a suspect in case 17 where Lola and Danishah talk to him with Paul's animal translator machine.
- Greñas had a near death experience in case #10.
- Greñas is one of the only 3 dogs mentioned or seen in the series.