Sonic.Jar otherwise known as Brine, is an entity from it's creepypasta: "Spectator".

Brine watches the protagonist's every move as it creates new levels and new adventures for her.

He's harmless, he would never inflict harm, however, once he shows his true form, things go out of control.

The First Victim dies in a gruesome way,

Her eyeballs pop out, empty eye sockets form in her face, her skull begins to shape like Sonic's head.

The Ribcage forcefully opens itself, the organs explode.

But what she didn't know, is that she was dead the whole time.

Brine couldn't help her, all he could do is spectate.

Which brought him to an status of depression.

He wants to kill himself so people don't die anymore.

Someone had to delete the .jar file from the computer and the flashdrive.

So yeah, this story is about the EXE wanting to commit suicide to save people.

Rather than manipulating to commit.

*cough* rewrite *cough*

If Brine met All-Father, A-F wouldn't be happy, he see Brine as useless and a coward.

Also yes, Brian has 2 sides, his friendly and kind side (1st image)

Then the form that kills people by looking at it (2nd Image)