Super fast

Hates Sonic

Always wants to win

Doesn't like the good guys

Opposes Eggman, well sort of

Wants to get revenge on the world for taking away is beloved Maria

The Ultimate Life Form

Hardly loses

Everytime he thinks about Maria he is sad

Hates G.U.N. Agents

Evil

Dark

G.U.N. Agents killed his love Maria

Ever lasting anger towards G.U.N. Agents

Hides everything

Over and over again he thinks about Maria

Go on in life Shadow, that's what Maria wants him to do.