Here is my question about escort.

Say you are flying Luke Skywalker and a couple of normal xwings, now all of them have escort.

Do the normal x wings escort Luke at all?

Can the Rebel player choose who is going to get attached? More of a who is escorting who.

No.

The enemy must choose someone with Escort, and as long as they choose someone with Escort... Its a legal Shot.

In these days, Biggs exists to attempt to protect Wedge and Luke.