Spidoodle the Field Mouse

Spidoodle is a common field mouse that was chosen by Nathaniel Grace (though to others he is known as the Mahjarrat, Marethyu), for the purpose of companionship. While extremely loyal to his owner, Spidoodle favours his own ideals and religion. He is, however, a loyal informant of Nathaniel, and continuously spies on his enemies (and sometimes allies) for information.

Wheat Gatherer
A Mahjar Informant