“Who? Who interferes?!” he yelled, wheeling around in the alley and apparently seeing absolutely nobody. But Kallen could see. The shadowy figure was beckoning to her, and more words appeared on the wall.

“STAND IN THE SHADOWS. I WILL MAKE YOU INVISIBLE. TRUST ME AGAIN, Q1. YOU SHALL WIN.”

Kallen didn’t even hesitate. Once again she had found herself backed up against the wall with nowhere else to turn but a mysterious unknown benefactor. What choice did she have but to hope and to pray that he truly could bring her the victory he promised?

Kallen carefully turned her attention towards the shadow standing opposite her. She was tempted to reach out and touch it, but there was a single stray light area in between the two of them. If she reached out now, stepped out of the shadow in any way would Frederick see her? The shadow turned its head and lifted its finger to its lips in a motion of silence. Okay. So they were invisible, but he would still be able to hear them. Good to know.

The figure lifted its hands and made a series of repeating exaggerated motions that caused Kallen a moment of epiphany. Sign language. Of course. “Understand?” he was asking. Kallen nodded. Of course she understood sign language. Quite often silent infiltration was a necessity when engaging in sabotage, which meant alternative avenues of communication were a must. “Good. Makes this easier.”

-Lulu's Bizarre Rebellion Chapter 6