Daigo was twenty-four years old when the Gorma wars began again. He was the most remarkable, gentle member of the team. In the beginning, he was a bit sullen. He worked all the time at a small pet shop and loved living creatures.

When Shoji and Kazu were attacked by Key Jester's puppets, he was the only one who believed Shoji and Kazu. He faced off against Key Jester alone, and lost, resulting in Kaori's soul being stolen. This caused him to be angry at his teammates, until Master Kaku helped set them straight and they begin to take their roles as Dairangers seriously.

In episodes 9 and 10, it was Daigo whose soul was open to the signal from Kujaku, trapped for 6,000 years inside the Mirror Make-Up Artist. He was instrumental in freeing her, but by that time he was already in love with her thanks to what Master Kaku had told him about her. While the other Dairangers come to dislike her due to her newfound sense of vengeance, he still believes she can be saved, strengthening his own sense of compassion in the process. Still, she was weakened by her battle with Gara, and disappeared, leaving Daigo to communicate with her through Qi.