She started as a high level of interest to me at the start also, but playing the game with 14 chapters of her not giving a fuck aboout your magical dick, awful flirt choices and the MC always bringing back fucking highschool all the time has left me disliking her character a lot and towards the end and lost interest in her totally. Now, I just ctrl/tab her segments. I now just reply the basic bitch non comital non flirty business like answers to leave her asap and i won't pick her whenever her time comes. Girls you have to fix and work on for a long time in a harem game don't work well for me.
Do any of the dialogue changes? Up to now, no girls seems to care if you bang-bus all of them. I could see myself a Marissa solo game, but not if it doesn't change anything.