Season 1

Ando is introduced into the show as the skeptic friend of Hiro Nakamura. He works at Yamagato Industries with Hiro, and when we first see him working, he is actually on Niki Sanders's strip website. When Hiro discovers his powers, Ando is completely skeptic, and doesn't believe Hiro has them.

Hiro continues to try and convince Ando that he has powers, but Ando still doesn't believe him. When the two go to a bar, Hiro tries to show Ando that he has powers by teleporting into the girls bathroom. Ando goes to get beer, and when he comes back, Hiro is being thrown out. Outside, the two argue, with Ando questioning why Hiro wants to be so different?

Ando is finally convinced that Hiro has powers when Hiro brings a comic book by Issac Mendez from the future, and Hiro saves a girl with them. He then agrees to go on a trip with Hiro to America, following the comic book. They hire a Nissan Versa and head for Las Vagas. The two spend time at a casino, where Ando tells Hiro to use his powers to get them money, which he does but they get thrown out of the hotel. After attending another poker game, the two argue and seperate, and Ando goes to see Niki Sanders.

Season 3
When Hiro travels to the future, he sees himself and Future Ando confronting each other on the a stairway, with Ando demanding the one half of the formula that Hiro has acquired. When Hiro pulls out his sword and attacks, Future Ando blasts Hiro with a bolt of lightning, immobilizing  him. Future Ando  takes the formula, and moves on.

Future Ando