Gojo is able to complete the Black Lobelia and Black Lily cosplays thanks to Marin's help. Both Marin and Sajuna try on their cosplays and they're both excited about how nicely they turned out, and Marin is even more excited about their upcoming group cosplay. When the day finally arrives, Marin and Sajuna get an unexpected visitor.
So I... was actually useful.
إذاً... كنتُ مُفيداً في الواقع
Ich war ihr wirklich eine Hilfe!
Al final sí que le sirvo de algo. 
Al final sí que le sirvo de algo. 
J’arrive bien à lui être utile.
Quindi io...
Estou... sendo útil para alguma coisa.