I met Yuzumori the Purple on a Dating site and in addition to being 10 years old, she's my sister.
From my favorite artist, Eri Au Lait
(Mind explaining 'the purple'?)
A Qualia The Purple reference, I believe.
Yeah, sorry, it's just that suddenly the apparently 2nd-tier protagonist in love with the younger odd genius got involved in physics talk. When that happened in Qualia the Purple, all hell broke loose. If you don't know Qualia, BELIEVE ME, we do NOT want this series going in that direction. Not with little Yuzumori-san.
I think it's to establish that Mimika, while a ditz, is not book-dumb in all subjects at all. So if they were married in the future, Yuzumori would have to make sure she had her lunch and tied her shoes, but then she might be working at a collider.