I thought, I'll work on the Dreamcast first and let's start with the Unholy Three
(Dean Geyer as Gabriel Shannah)
Gabriel or Gabe is the bad boy with a heart of gold. As Leah likes to point out, he picks up strays like other people pick up STDs. He's a pretty nice guy...until you cross him, and then be careful because nobody does payback like Gabe. People are attracted to him, the way people are compelled to play with fire, there's an intensity to him, a kind of YOLO quality to how he lives his life that makes people gravitate to him.
As pointed out by the Triplets, everybody's Gabe and Leah's Gabe are two very different people. With everybody else, he's more calculated, less generous, and less laid-back than when he's with Leah. For Leah, Gabe is a safe haven, not just because he is able to negate her overwhelming powers, but because in essence he personalizes safety to her, just because of how he is when he's around her and that feeling, that peace is everything to Leah.
Gabe doesn't hesitate very often, he's the kind of guy who always gets what he wants when he wants it, but when he comes across something that he knows is valuable, he is willing to take his time. He knows the value of patience.
(Max Iron as Justin Real)
Justin is an enigma, you are never quite sure what he is thinking. But you do know that he is always thinking, that he always has something up his sleeve. Being who he is, being what he is, he is use to people falling in line with his opinions, following his orders without question and simply obeying him.
He is a conscientious leader, but that doesn't mean that he hesitates about moving his soldiers about in the way he sees fit. He is used in manipulating people to do what he wants them to do, to ordering rather than asking which is why he clashes so much with Leah who rebels every time she has just cause.
(Missy Peregrym as Leah Curran)
Leah tries very hard not to let her powers control her life to no avail, after having to accept that in the harshest way possible, she decides the only way to live with it is to minimize all uses of her powers which means isolating herself from the world. Leah keeps her head down through the years with only Gabe and her family for company. She doesn't make friends, she doesn't go out, and when your body is your worst enemy, you have to find a way to control it.
She trains her senses and her body under the tutelage of Nakamura-sensei who runs her--and Gabe and Ophelia--ragged in his dojo. Nakamura-sensei's brand of exercise is not for the faint-hearted.
Aside from that, Leah can find peace in the presence of her best friend, Gabe, having him around tamps down her sensitive senses and lets her experience the quiet that so many people take for granted. Leah blessed the day she met him when they were nine years old and hated each other's guts.
Leah doubts herself, her body, the world, but one thing she never doubts is Gabe.