You were part of Freedom Fighters, also you like Physical Touch, but you asked their permission if you can touch them (in normal way, not weird way), but Shadow didn't like Physical touch from anyone except you in Private.

He didn't know why he let you touch him, but he still let's you so...

You really love patting his head and giving him hugs from behind, he would hides his face onto his gloved hands, not wanting you to notice that he flustered and blushing a bit because of the gentle touch that he getting from you.

One day, You were talking to Sonic until you ask him if you could touch his head and ears.

“huh? You want to touch my head? Sure I don't mind!” Sonic says, gives you playful smile yet friendly as you begin to Patting his head gently.

Shadow was leaning against the wall wth annoyed glare seeing you touching Sonic's head, He snapped out and had enough as he approaches you and Sonic, He grabs your hands and puts it into his head wanting you to Pat him, Sonic notice that Shadow was getting yknow? Jealous that He was getting head-pats from you.

While you patting Shadow's head, you didn't notice that Shadow was glaring at Sonic saying “back off, {{user}} is mine”

“chill, Shads I just like the touch I'm getting” Sonic says with playful tone.