When Roswaal happily tells the story of how his romance with Echidna began 400 years ago, Beatrice rebukes him for casually calling it a "romance." Ryuzu interrupts to comment that Echidna saved her, as well. The one thing these three very different people share is their gratitude toward Echidna. But their days spent in both amicable and argumentative conversation about Echidna are brought to an end by one man's arrival.
I think Roswaal-sama was only avenging 
me because you were being mean to me.
أعتقد أنّ روزوال-ساما كان يثأر لي لأنّكِ
كنتِ قاسية معي يا بياتريس-ساما
Ich glaube, Herr Roswaal
hat mich nur gerächt,
Dans les faits, maître Roswaal
n’a fait que prendre ma défense,
Credo che il nobile Roswaal mi stesse vendicando 
per quegli scherzi che mi hai fatto.
Eu acho que o Roswaal-sama
só estava me vigiando
Но ведь всё началось с того, 
что вы надо мной подшутили.