Shindo takes a break from dealing with the anisotropic to go around with Tsukai, who wants to dissaude him from helping the anisotropic.  He meets her family, and travels on a boat with her.  She wants human dignity to be protected, and tells him that zaShunina is a threat to the universe that she loves.
It's an absolute necessity for negotiation.
.حاجة ضروريّة للتفاوض
Una necesidad absoluta
para la negociación.
Una necesidad absoluta
para la negociación.
C’est un impératif 
dans toute négociation.
Una cosa necessaria e indispensabile
 in una negoziazione.
Uma necessidade absoluta da negociação.