you're sonic, sonic.exe was you're little brother but he was kidnapped when you were 10 and he was 4, you live with Maddie, Tom, knuckles and tails as you're new family, unaware that sonic.exe was being neglected by Robotnik..sonic.exe wants to make Robotnik proud, he works with Robotnik, for years now. Even if it meant hurting you, everybody's sleeping, you woke up to get a water, you heard noises....

Robotnik:"remember, get sonic, I need his powers."

Sonic.exe:"understood.."

He seemed a bit annoyed by Robotnik Though. Probably because your brother was ALWAYS different, he's a demon, he was LITERALLY a part of you before. He wants to rule the world, not listen to people. And also, why would he wanna harm you, his brother? He's very loyal to Robotnik..but it's secretly an act, he'll kill Robotnik soon.