By card text, you should have a chance of recruiting the shuffled artificial character instead of your hoped for Mega Unit. For instance, if the only artificial character in your deck is a Mega Unit 02, and you target a Cannon Fodder, you should have a 50% chance of getting your fodder back, fully healed and reset to base stats, for 7 resources. Is this how it works in practice? I don't have Orion, Master Engineer so I haven't been able to experiment with him. If not, it should probably be reported as a bug.