After the battle inside the Ziggurat, Chizuru and Hayate are horrified to find out that their victory would have cost Koyori her life. They agree to help Tazuna and Koyori, even though they're out of the fight now.  They tell the two of them that in order not to be found in the real world, they need to come up with a name to use inside the Ziggurat when they fight.  After a bit of thought, Tazuna and Koyori's new name becomes "Single Gear".
And I'm going to get really 
mad at you later, Hayate!
!وأنت سأوبّخك في وقتٍ لاحق حقّاً يا هاياتي
Und ich werde nachher
richtig sauer auf dich, Hayate.
¡A ti ya te gritaré luego, Hayate!
¡A ti ya te gritaré luego, Hayate!
Et toi, Hayate,
tu ne perds rien pour attendre.
Più tardi mi arrabbierò
moltissimo con te, Hayate!
E vou ter uma conversa muito 
séria com você depois, Hayate!