These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Mary Sue: Roomie is an unrepentant moocher who seems to have no respect for boundaries, or even comprehension of them. Everyone she meets seem to think she's perfect, with the possible exception of the Defrosting Ice Queen, whose gradual warming up to Roomie is presented as positive Character Development on her part. She's also practically irresistible, an able martial artist...Need we go on?
Moves on to be deconstructed later on in the comic - Roomie is portrayed as deeply unsettled that she serves as a Manic Pixie Dream Girl to everyone, but stays in the same place she always is herself and notices how little character development happened to her when she returns and realizes that people moved on just fine without her around.
Memetic Mutation: "Welcome to "GGaR" is an oft used phrase by the fanbase. Typically when a new reader completes an Archive Binge and catches up to the current page.