Terios the Hedgehog

defeat Shadow the Hedgehog

He hates Shadow for two reasons. One, Shadow replaced him. Two, he believes Shadow let Maria die

Maria Robotnik was a girl who had a terminal illness. Project Shadow was designed to save her. Despite this, Maria ended up sacrificing herself to save Shadow from a G.U.N. agent

None

Project Shadow was a project by Professor Gerald Robotnik to save Maria Robotnik. There were three creatures made in Project Shadow: the Biolizard, Terios the Hedgehog, and Shadow the Hedgehog. Shadow was basically the replacement for Terios

Cold, edgy, depressed, has a strong sense of justice, refuses to harm those he doesn't believe deserve it

Sometimes, but only when the situation really calls for it