Amano did not design the characters for this game. I don't remember the name of the people who did; but it was a team of people, rather than just one designer. Amano just did after-production art.
And the concept art for the game was done in chibi form too. ^.^
And the concept art for the game was done in chibi form too. ^.^
The artists you're thinking of are Takeshi Nozue and Toshiyuki Itahana. 
. Ahaha.
