Who needs a handler? This is Cassidy, a normal human who has been with the Agency for a few years now. She has an unfortunate tendency to view supers less as human beings, and more as dangerous tools or weapons. There's only a little bit of sympathy for their plight. Though she can be strict, I'm sure she would have built up a rapport with some of the supers at The Hive, even those who aren't assigned to her directly. She's married to the job and probably spends a lot of her spare time still there.
I also have a super named Lucas, roguecharm, powers to be determined. I'm inclined to make him something like a tank, maybe with some invulnerability mixed with another power or two. He's been with the system longer than Cassidy, for more than a decade now, so he's had time to relax into the role and come to terms with the lifestyle and what they do.