Character Strategy- Jyn Erso

2 Dead Rebels (Cassian and Chirrut)-> 3 Critical hits-> 1 Revived Rebel

The missing opponent was General Kenobi so no one on the enemy team that prevents revives

http://i.imgur.com/zapVtRM.gif

To me the description is:
if it crits revive 1 random rebel ally. This revived ally will recover 20% health for each crit hit scored, which is what is happening.