Concept ideas for Sonic
Madeline Schroeder thought that the character was too Japanese and wanted to change Sonic to be in both suitable American and Japanese forms. So, she had to go to Japan and tell SEGA of Japan why should Sonic change.
But it didn't turn out to be easy, Yuji Naka did not like it how mascots should be made more American, but he obeyed. Later she suggested him to remove Madonna and the rock band and to change the hairstyle.
Yuji Naka brought up the character with three visible spikes in the front side pose, the back pose and the front pose show five "slacked-down" spikes. Naka then realized that she was right, which brought up a bright future to the character.
Madeline also said in an interview that she never doubted Sonic, she was more like a 'mother' to Sonic and that "Mothers always care for their children", meaning that it was more like 'protecting' Sonic. Thus, she is very happy that she "softened" Sonic's look very much.
Madeline proudly calls herself the "Mother of Sonic".
Tenure as the blue hedgehog
After a few years of the success of Sonic the Hedgehog, SEGA decided to hold a convention where children can play Sonic the Hedgehog as well as Mario games.
Madeline Schroeder was in the SEGA mascot costume. When she came, she saw a child playing Sonic the Hedgehog and he didn't notice her. She was so shocked that she was right beside him in a big blue costume and he didn't notice her. The same thing with some other children who were playing right beside him. She quoted,"Sonic was that famous!" She said that she had never seen people playing with video games in such a way.