To be honest I admit she was cuter, the thing is she was never supposed to be that cute, she was supposed to be a tough as nail intimidating chick, my inspiration for her was Tank Girl after all
If anything, I'm surprised she doesn't have a dominant path that can be opened up especially considering that she'll do a proposal. She comes across as someone that could be a great power bottom that is forceful, opinionated and active outside the bedroom. Opposed to how Sasha is leaning into more of the sultry mistress figure. I would even say a step deeper, she strikes me as the type to tell the MC when she wants to give up birth control instead of being commanded to give it up. She likes abandoned buildings, rooftops, etc. Perhaps some scenes could be initiated where she pushes MC into out-of-the-way nooks and crannies, maybe a bit dirty or dangerous, for some freaky somewhat-risky public sex. Like on the rooftop. Or in the garage. Mike crawling out of it with grease handprints on him haha.
You have a lot of female characters that, in time, pull off the leg-trap/leg-wrap/cowgirl trick for getting pregnant, which is sneaky, but someone like Kleio could be way more direct. Like the player selecting to use a condom still leads to a scene where the condom isn't used. Be it Kleio tugging it off, or MC inventory being emptied of all condoms and something funny to do with Kleio seeming to know they're gone already. Maybe they all vanish any time the marriage-proposal-level Kleio is allowed to stay the night after sex. If the MC has more the following sex event, "Goddamnit!" I thought I got them all."
Intimidation, toughness, etc. Should probably come from her events? Best expressed when the MC says something stupid? Some of your other characters point out in their dialogue quite rightly that clothing/appearances and actual character are different. Washing out the cute in her design doesn't enhance her character as written. It falls right into a stereotype that cute belongs to the girly, only. Besides, her ink is badass.