Your attacks will not go through. That is the rule.
[AUTO]:[Retire this unit] When this unit is placed on (GC), if you have a unit named "Star-vader, "Omega" Glendios" on your (VC), you may pay the cost. If you do, choose one of your rear-guards with "?" in its card name, and change the battle of the attacked unit to that unit, and all of your guardians goes to guard that unit.