|This article is about a/an mentor in Choujuu Sentai Liveman.|
Doctor Hoshi (星博士 Hoshi-hakase, 1-2): The principal of Academia, made the Gran Tortoise as well as the robot assistant Colon, and gave the Liveman mecha the ability to combine before dying. He died helping a pregnant woman trapped in the rubble of Academia Island escape.
- Doctor Hoshi was portrayed by Daisuke Ban; he is most well known in Sentai as Makoto Jin, the second Battle Cossack of Battle Fever J
- He is the first Sentai alum to portray a mentor; even if he only was in two episodes.