The Promethea characters in the comic novels aren't your typical day-to-day kind women even when they aren't promethea. They all act and talk differently than you would expect a female superheroine to talk. The reader first sees this with Barbara when she's fighting the smee. She uses curse words such a "son of a bitch" and she openly tells Sophie not to be stupid. She's not tolerant or doesn't try to be kind. We learn about the other Prometheas when they are all hanging out together and discussing the new one, Sophie. Grace comments that she is mostly likely "flat chested and neurotic" and later Bill tells Margie to "shut up". Of course, they're not all like that. Anna, who is actually a servant calls others Mistress and Margie is a little girl but the others seem to act and talk quite masculinly. More than a group of Prometheas you would expect young guys to talk like that to eachother. I also think that Sophie will fit in well with this group. She, herlself, doesn't act like that a lot but her friend Stacia sure does and she has a good way of responding to her. She also says, after meeting the Five Swell Guys, that Stacia will "hemorrhage".
The Promethea characters aren't quite like Wonder Woman. They are more human and also less selective of their words.