Using canon contacts as hostages
A few might be available. Most are not. You can fake it by making a custom critter that looks like the contact. Some of the older contacts might just be copies of civilians, which are available in a large variety of flavors.
Eva Destruction AR/Fire/Munitions Blaster
Darkfire Avenger DM/SD/Body Scrapper
Arc ID#161629 Freaks, Geeks, and Men in Black
Arc ID#431270 Until the End of the World
Short question - can it be done?
Slightly longer question - if it can be done, how exactly?