I like to make up scenarios for these, for instance the Marisa was chosen over the scum, the scum was thrown out in favor of the gold badger, the gold badge used to be Reimus, the Reimu is just a jealous scum trespasser etc...
I prefer the idea of Reimu pulling a "you go and sacrifice for mommy while mommy escapes!" after tresspassing the anon's home, only for marisa to be picked up by anon and trained to be a gold badge. Reimu may later try again, maybe using a fake self righteous justification of "anon owning her for "killing" her child" only to find that child in a very easy position and as a pet. Cue jelly, shouting, shitheading and anon finally killing the piece of shit Reimu for good. Cool points if Marisa Braid Shoryukens Reimu for insulting anon or something!