Commander Abraham Tower or just referred as The Commander is the High-Ranking Military Agent of the G.U.N. (Guardians Units of Nations).
The Commander first appeared in game Shadow the Hedgehog where he blamed Shadow for killing his family and the childhood friend that the Black Hedgehog had a close connection with Maria Robotnik, Granddaughter of the famous Mad Scientist Dr. Gerald Robotnik and the cousin of Dr Eggman.
His opportunity for his revenge is to kill Shadow at first, but even he thinks that Shadow still has no memory for what he is done with his family. Even it wasn't Shadow's fault, Black Doom betrayed the Black Arms, even for Shadow and for his people on Space Coloney Ark as The Black Devil Doom was responsible for all the destruction he caused.
In the Final Stage The Last Way, Shadow uses his super transformation as he used the 7 Chaos Emeralds to defeat The Devil Black Doom and once he defeated him and The Black Comet, The town is saved and The Commander owed his apology to him the way he treated his revenge towards him.
In the next game of Sonic the Hedgehog 2006 game, The Commander decides to welcome and hire Shadow the Hedgehog as a G.U.N. agent along with his partner Rouge The Bat as their main mission to relocate and destroy Dr Eggman and his robots at his base.