Yeah, I agree with that. Unfortunately, I didn't develop her as much as I should have until now and she feels a bit hollow in comparison with the other Lis.
But she'll have more screen time and more meaningful interactions with the MC in the future. I hope that helps make up for that.
To me she was developed well as a good friend and a mature person. But I never got the vibe that she needed a kink. She was fine. Like the badass normal character in a world of superheroes. She was the exception to the rule. A mature mother surrounded by horny party animals.