The last name is the same, so I expect it's the same person. Maybe they called her Irina. All I know is that in the book, "A Dance with Death," She's referred to as Irina Kashirina. I think I'll keep her name the same though, since Irina is what they called her. It's just like you guys call me Boosher. My real name might be Mike, but you call me Boosher because that's how you know me. She may have introduced herself as Irina, so that's how the girls knew her.