Mel is a young member of Blue's pack and is forced to steal food from the pet store for Blue. He is commanded to attack Weed when he enters Blue's territory. Weed talks to Mel encourging him that he can be who he wants and he doesn't need to serve Blue. Mel gains the spirit to stand up for himself but is beaen up by Blue. He is saved when Blue runs away from Weed, Smith and GB. Mel is moved by Weed's strength and kindness and decides to join him on his journey to Ou.

Akame is sent by Gin to go find Weed and the rest of the Ou dogs, he passes out from exhaustion and Mel is left behind along with other unnamed soldiers to take care of Akame and to protect Gajou. While Mel is hunting he encounters some of Genba's men and gives them the wrong directions to Ou since he senses somthing bad about them. They take his kill and later return while Mel howls for help ontop of Gajou. Genba's followers kill the remaining soldiers at Gajou and Mel fights knowing this. He is a brave, young dog. When he gets pushed to the ground and is held there, Kurotora and his nephews show up. Akame appears before they battle and takes Kurotora and Mel with him. They go down river and find Reika, Hook, Ben and Cross.

Mel/Mer is a short from his full name "Mercedes"