Colleen is a no-nonsense Rough Collie from the United Kingdom, and the only female in the group. Colleen is the coordinator of the team, always checking to make sure everything goes well without any problems or issues. She is also a skilled martial artist, using her skills to help the team. She gets along well with the team, and with her good looks, many of them have a crush on her. It is hinted that she had mutual feeling for Hunter. Blitz also has feelings for Colleen, but these go unreciprocated, with her playfully making fun of Blitz in return, to the point of anger. Nothing it known about her past family or master, and she currently resides with the prime minister of the United Kingdom.