I agree with basically everything that's been said. i plan to do one massive monotyped run once i finish E19 for the first time. and this time i'll be exploring everywhere, talking to everyone and doing everything i can to experience the full story.
what i know about amaria and titana stems from the ingame dialogue and tania's diary, that's it. and from it i can see Amaria is at fault for doing nothing about her obvious depression issues and tania is truly trying her best. on the flipside its a touchy subject to bring up and being as blunt as that may come off as offensive to people who have serious experience with depression IRL. speaking from experience as the Tania of a duo (my housemate, basically my brother now. has personality disorder and suffers bouts of insomnia depression etc) sometimes it can be difficult to stand strong as the pillar of hope the other person needs, but if you can stay there through the thick and thin, even if you dont do much besides be a shoulder to cry on. its enough to help.
Psychiatrists can only do so much, sometimes the best help for depression is just good friends and people to depend on. Tania has the misfortune of being the only pillar holding up amaria's crumbling psyche. but if she could properly make friends with the other leaders like Julia, Shelly and Hardy. even some of the rivals like Cain and Heather. she could improve and lessen the burden on tania, might make tania some new friends and feel a bit happier herself.
i am curious to know what, if anything. will be done with this duo in the endgame, or if their arc was the finale for them. i hope not since "Congrats everything is back to how it used to be, god fking dammit" from Tania followed by "I'm OK with living a lie"/"i'm even more depressed than i was before" from Amaria is a sour note to end on.