Having a crying session every 5 days doesn't seem very healthy to me, but showering once every 2 weeks might be fine. I've gone many days without showering many times in my life and nothing bad ever happened to me as a result. I'd usually shower before going out and interacting with people, but when sitting at home there just never seemed to be any point to it. And Aella's showering habits haven't stopped her from reaching her goals, so it doesn't really matter.