Joule is team MAYHEM's resident summoner. As it has been since time immemorial (or at least the mid nineties), the virtue of Joule's conjured turret isn't that it can attack enemies, it's that enemies attack it instead of you. This is a workable (if slow) strategy against regular troopers and mobs, but it shines against shocktroopers, pride captains, and other boss monster types. While she's capable of taking these enemies out all on her lonesome, she also works well as the first part of a set/spike- draining shields and inflicting vulnerability before a punchier agent finishes the job. With Joule in your team, even late-game boss fights can become a breeze, and she is a strong asset in even the most difficult lairs.
Joule can be recruited after Operation:Heaven Sent is complete