DINO is a character and NPC in OMORI. He is known as the founder and owner of the ongoing DINO'S DIG attraction. DINO is a dinosaur reminiscent of a T-rex in appearance due to his unusually stubby arms. DINO appears to be optimistic and cheerful when speaking. [description pulled from the OMORI Wiki]

Consider some sort of dudebro or surfer dude voice. Open to interpretation, but he should be friendly and upbeat. The best DINO voice is one that makes us feel like we're at a theme park and he's our guide.