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're the one who told them 
about the Hand Shakers, right?
أنت من أخبرتهما عن المُتصافحين، صحيح؟
Und sie haben ihnen doch alles
über die Handshaker beigebracht!
Al menos eres quien les habló
de los Hand Shakers.
Al menos eres quien les habló
de los Hand Shakers.
Vous leur avez expliqué
le principe des Hand Shakers, non ?
gli hai insegnato ciò 
che riguarda gli Hand Shaker, no?
Foi você que falou a eles 
sobre os Hand Shakers, né?