Lola is an absolute idiot (possible spoilers)
This is such a great film it's a shame the character of Lola (Shelley Winters) is such an incredible, foolish idiot.
She gets hooked up with a man she knows is a cowardly boob (Steve). She sits around with Waco even as he taunts and kills Steve. She hardly registers any emotion about Steve's death. Astoundingly, she voluntarily escapes from the burning farmhouse with Waco and rides along with him, even though he had to get away fast and she could have easily gotten away from him (he was only holding her by the hand when they got out through the window). She antagonizes Dutch Henry. She stands there like a dumbbell staring at the photo of Lin, Dutch and their father until Dutch catches her and realizes she knows Lin, then stands outside tossing around the bullet Lin gave her, again getting caught by Dutch Henry and spilling how she knows Lin. In Tascosa, she gets in the way of Lin as he's trying to defend himself against Waco outside the bar, nearly getting him killed in the process, then does it almost immediately again when High Spade tries to get out the door to help Lin -- all the while screaming hysterically. She then runs screeching into the street, yet again gets in the way of Lin shooting Dutch Henry, then gets in the way a fourth time as Dutch shoots her -- probably by accident in the confusion, but you wish it had been on purpose, since in that case he would have certainly killed her and put everyone out of their misery.
In all this she acts like someone with an I.Q. of 80, a blank, brainless imbecile who can't think anything through, just reacts from crisis to crisis in the most unthinking manner possible. She is so stupid, so helplessly unhinged, so unable to think or do for herself, so dense to be able to realize what's going on and keep her mouth shut, that she repeatedly endangers Lin and even makes her own situation worse.
So the question is -- what in God's name does Lin see in this fat, stupid dunce?
This is one of the worst-written female leads in a major western (I'll leave out other genres). Lola is an insult to women everywhere, every way. No, she's not a bad person, but she's so thick and clueless that it's inexplicable why Lin could be so interested in her. Couldn't they have provided a leading lady with brains, "street-smarts" and some shrewdness, instead of this yammering dunce who seems to walk off with whichever man she happens to be with at the moment?