Who is Lince (Lynx) from Crank and what is their importance?

Lince is Adam's girlfriend before Kristina visits Albuquerque. When Adam meets Kristina, he attempts to mess around with her behind Lince's back. However, Lince discovers their relationship. Because she is high on drugs and angry with Adam, Lince assumedly jumps from the balcony outside Kristina's dad's apartment. Lince claims this is her way of getting back at Adam for dating Kristina behind her back. Although it is not believed Lince will survive, she does eventually regain consciousness and is able to come home from the hospital. In one of her last phone calls to Adam, Kristina learns that Lince is pregnant with Adam's baby.