Human version of Timothy Brisby from the Secret of NIMH, for my AU "Mrs. Brisby and the Bund of NIMH". Third child and second son of Brisby Family, Timothy was born prematurely and his birth nearly bled his mother to death, but miraculously, both survived. However, this caused his father Jonathan to fear for his wife and children's life. Timothy is a quiet, but curious child always asking his parents many questions and doesn't rest until he got a satisfying answer. When they couldn't, he looks for books to solve his curiosity.

Suffering from illness, it is revealed his DNA as half human and IM-Human were fighting for dominance, causing the symptoms to be similar to pneumonia. In addition, his baby fangs grow and avoids the sunlight, temporarily lost his ability to speak other than groaning, moaning, whimpering, and so on. However, in the end, his father's DNA of IM-Human takes a full control, overcoming the sunlight, gaining immense intelligence and inheriting his father's growth of magic.