Himekawa needs more power to fight against the tri-headed dragon that caused her so much trauma in her past.  But the pleasure of the Climax Hybrid goes against the strict and disciplined life that she's forced on herself after she failed to protect the people boarding the Tokyo megafloat.  It's up to Kizuna to break down the walls she's built up for herself, and teach her to enjoy the ecstasy she needs to defeat the enemy.
which is why I was able to 
save Yurishia and Aine later.
konnte ich später
Yurishia und Aine retten.
por lo que pude salvar
a Yurishia y Aine después.
por lo que pude salvar
a Yurishia y Aine después.
j’ai pu ensuite 
sauver Yurishia et Aine.
così, tempo dopo, ho potuto salvare
 sia Yurishia che Aine.
e foi por isso que consegui 
salvar a Yurishia e a Aine depois.