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".
you can be challenged, even 
if you're not holding hands.
يمكنه تحدّيكما حتّى لو لم تكونا تتصافحان
werdet ihr zu Kämpfen herausgefordert,
auch wenn ihr nicht Hände haltet.
podrán retarlos
aunque ustedes no vayan de la mano.
podrán retaros
aunque vosotros no vayáis de la mano.
tu peux y être transporté
même sans serrer de main.
venite sfidati in battaglia
anche se non vi tenete per mano.
você pode ser desafiado mesmo
 sem estar de mãos dadas.