David Johnston wrote:
In reverse order of appearance:
Cat: Red Battler (Which was odd since the cat was blue)
Rei's Grandfather: ? Hino (He is never referred to by his first name so...)
Motoki's Girlfriend the Entomologist: Reika
Artist: Yumeno Yumemi (In Japanese she didn't have two names, she just
lived reclusively and kept her real appearance a secret)
Correction, I may have assumed too much here. But Hitoshi didn't have
her "real name" if she had one.
Precog Boy: Urawa Ryo
Minister: They never actually got his name. However he was a gaijin, so you
wouldn't have to work too hard to come up with a name for him.
Telekinetic UFO Catcher Guy: Believe it not: "Joe".
http://www.win.or.jp/~doi/smoon