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.
Because he knows he can't 
save Echidna-sama otherwise.
لأنّه يعلم أنّه لا يستطيع إنقاذ إيكيدنا-ساما لولا ذلك
Weil er weiß, dass man
Fräulein Echidna sonst nicht retten kann.
porque sabe que es la única forma
de ayudar a la señora Echidna.
porque sabe que es la única forma
de ayudar a la señora Echidna.
c’est parce qu’il se savait incapable
de sauver dame Echidna autrement.
Perché sa che altrimenti
non potrà salvare damigella Echidna.
Porque ele sabia que não poderia
salvar a Echidna-sama de outra forma.
потому что знал: никак иначе
 госпожу Ехидну не спасти.