Goro-chan, (in my opinion) is the most mysterious person in his group. Much like when he was a child Goro is quiet. I say Goro seems mysterious because of his eyes that seem to sparkle and hold mystery. Plus he often has a serious dazed look on his face.
Goro lived in Tokyo all his life and went to a high school for actors with Tsuyoshi. However, he seems to get along the most with Takuya.
His starred in dorama's (Japanese dramas) such as Kare Which aired March '97. Although he had many other Dorama's and movies (No I wont name it all!) Kare was my favorite one.
He was also in a play, Hiroshima ni Gengaku wo Otosu Hi which was performend in June '97.
credit
http://www.geocities.com/tokyo/flats/8712/goro.html