[Kiritsugu, Omega, Not-so-safe anymore location, Code Geass]

Seeing that their position was compromise, Kiritsugu allowed himself to give a "tch" of annoyance. "We can't stay here. We need to leave. Even if we defeat the group right now, more will come." 

And with that, he concealed his presence with general magecraft before slipping out. Making an escape, Kiritsugu entered the sewers where it would be too small for the knightmare frames to enter.