Just leaving a note that this is credited to Yamazaki in the episode ending credits as well as the description of the YouTube video mentioned in the tweet.
This is really cute and sweet! I really wish we could get to see Kosuzu interacting with the Three Fairies of Light in a manga chapter, doujin, or fanfic.
In fairness, Miku is an android, so destroying her would yield no blood, which V1 requires to live. Killing her would be utterly (and probably literally) pointless.
For those not in the know, Wallaby is from an Australia-based high school, and she's parodying the pose of "Raygun" of Team Australia from the breakdance competition.
