Martin Brisby in human version for "Mrs. Brisby and the Bund of NIMH". Secondborn and first son of Jonathan X Elizabeth Brisby, he is a self-proclaimed "Man of the house" since his father's passing. He does not like how men try to woo his mother and is seen chasing them away. He likes to practice dueling sports and is dismayed to be treated as "less intelligent" as he occasionally reads hard books for his age.

Soon to be 10, he takes care of his ill little brother Timothy and little sister Cynthia. Holds his father with IMMENSE respect and admiration, Martin wishes to be as brave and wise as his late father Jonathan. Along with Teresa, he promised his father to protect their mother and younger siblings prior to Jonathan's death. Initially, he was reluctant with idea of Justin being a possible stepfather. But, he quickly opens up when he learns Justin is a friend of his father AND is a skilled swordsman/captain of the Imhuman guards, wanting to be trained by him someday.