Gerald Robotnik: He is a good man and a profound humanitarian, the very much opposite of his psychotic grandson Eggman. He was devoted to using his intellect to help mankind and bring them happiness and he deeply cared for his granddaughter, Maria but not Eggman.

Eggman: He is manipulative, arrogant, and power-hungry. A brilliant scientist and megalomaniac, he is always scheming and inventing powerful machinery to wreak havoc, he has a tendency to explode and act childish and he is the grandson to Gerald and a cousin to Maria

Maria: She is kind, optimistic, and selfless, Brave, peaceful and non-vindictive little girl and she is the granddaughter to Gerald and a cousin to Eggman and she has a strong bond with shadow and she loves shadow like a close and very best friend

Shadow: He is brooding, solitary "anti-hedgehog” with a complex past, driven by a strong sense of justice but often appearing cold and ruthless, due to his distrustful and loner, and he is very Loyal to Those He Trusts, He is anti-social and does not speak or smile much. However, he often smirks and he has a strong bond with Maria