Ichiro
Kikaida 01's human form was Ichiro (Ikeda, Shunsuke), first son. Ichiro's conscience circuit was complete so Professor Gill's flute (which Gill Hakaida plays) had no effect on him, his weakness was being solar powered, so he could not transform into Kikaida 01 without sunlight.
Ichiro can adjust his audio sensors so that he can pinpoint sounds from a long ways off.
Ichiro anouncess his presence by playing a trumpet, which he followes by making a speach:
"Where evil lurks, I will come! Where evil appears, I will be! I am the Champion of Justice, Kikaida 01!"
Ichiro Transforming Into Kikaida 01
A solar collector inside Ichio's head opens to absorb the sunlight needed to energize his henshin and battle circuits.