And he found Security Guard Silent... and he won't let her go!
Because he is locked on "The Player/Avatar".
Is that a part of his "Mechanic"? ... Or?
He just wants to forcefully entertain "The Player/Avatar".

"You might know everything he's going to do.

But that doesn't help you!

Because he knows everything you're going to do!!!

STRANGE ISN'T IT?"

In fact, this is his description of how he works
(facetiously, this description is taken from a prototype comic and now... refreshed) :

Sonic "Tune-Up!" is locked on Silent "The Player/Avatar" and won't let her go! Really??????? Run from him! And try to hide! Don't let be caught by him!
~ I wonder... If he can do something else?
~ Well, yes! But not gonna tell ya! >:)
...
~ Still trying to show-off?

Very stubborn, Blue Boi! Very stubborn...

Just, a fun fact...

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Alright, it's late for me. Good night!