The series focuses on a framed police officer who becomes a masked hero in an attempt to clear his name.
Glau, who plays Orwell, told IGN: "I feel we have a perfect balance. I didn't know until I went into the table read. I hadn't had much of a chance to picture what the show would be like when I got cast.
"When it came to the table read, it came to life. Afterwards I was shaking, I was so excited and proud to be part of this cast, because I feel like it has a lot of heart. It comes from a real place and it's about somebody that you could picture being a real man."
She added: "We have all these supporting cast that bring in humour and light moments and that's a really important balance."
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