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".
This is another thing you can do if the 
target's within a range of one kilometer.
هذا أمرٌ آخر يمكنكم فعله إذا كان الهدف
ضمن مسافة 1 كم
Das geht auch innerhalb eines
Radius von einem Kilometer.
Eso también en caso
de que estén a un kilómetro.
Eso también en caso
de que estén a un kilómetro.
Le fameux rayon d’un kilomètre
s’applique aussi dans ce cas.
Anche questo è possibile se gli avversari
si trovano nel raggio di un chilometro.
Isso é outra coisa que pode ser feita se 
o alvo estiver dentro de um quilômetro.