Primary

• Shadow the Hedgehog Friend of Maria Robotnik
• Shadow the Hedgehog Rival of Sonic the Hedgehog

Extended

• Sonic the Hedgehog Friend of Christopher Thorndyke
• Sonic the Hedgehog Best friend of Tails
• Sonic the Hedgehog Rival of Shadow the Hedgehog
• Sonic the Hedgehog Friend of Amy Rose
• Sonic the Hedgehog Friend of Knuckles
• Maria Robotnik Granddaughter of Gerald Robotnik
• Maria Robotnik Cousin of Doctor Eggman
• Maria Robotnik Friend of Shadow the Hedgehog