Tobias is one of the six original Animorphs, from the series/TV show of that name. His PB is  Aaron Eckhart, his journal is at ~birdboy, and he is played by Colleen.

For anyone wondering, Tobias has been aged up to a 31 year old, a decade of which was spent in the UTR-verse. And yes, he's still a bird, most of the time.