I.M. Weasel is the titular main protagonist of I.M. Weasel franchise. He is a globally-celebrated, heroic, kindhearted anthropomorphic weasel who serves as the titular character of the program. He is noted and admired for his endless, humongous assortment of unselfish, amazing, brilliant talents or achievements, and is honored and respected deeply for his extensive skill, knowledge, or experience in virtually every field imaginable. Wealthy and immensely successful, he resides in a mansion beside I.R. Baboon's filthy trailer. However, he is the primary object of I.R.'s animosity and envy for his admirability and fame, and I.R. often tries to emulate or surpass him with no success out of jealousy. On some occasions, I.R.'s hazardous goals may require Weasel's assistance in either rescuing him or helping him. Weasel is commonly accompanied by Loulabelle, an attractive young lady costumed as a nurse.