E-123 Omega (Ｅ－１２３＂オメガ＂?), or Omega E-123,[9] is a fictional character from the Sonic the Hedgehog series. He is a robot created by Dr. Eggman as the last and most powerful of the doctor's E-Series robots. However, he was deactivated and sealed in an abandoned base to guard Shadow the Hedgehog, who was in suspended animation in a stasis capsule. Furious at having his power wasted in this way, Omega swore revenge on his creator. Rouge the Bat then accidentally reactivated Omega when trying to free Shadow and she soon convinced the two of them to join together as Team Dark to track down their mutual enemy.[10] Although Omega failed to achieve his goal at the end of his team's adventure, he has continued to pursue his mission, occasionally coming to the aid of his allies and other heroes.

Cream the Rabbit (クリーム・ザ・ラビット Kurīmu za Rabitto?) is a fictional character from the Sonic the Hedgehog series. She is an anthropomorphic rabbit and the daughter of Vanilla the Rabbit. She is also a friend of the Chao,[4] especially to her dear Chao friend Cheese, who she takes with her everywhere. Originally living an idyllic life with her family, Cream had a chance encounter with Sonic the Hedgehog and his friends when the evil Dr. Eggman entered her world, and soon began joining them on their adventures. She is able to achieve flight by flapping her large ears.