The negotiations between Sirius and Erwin advance at such a rapid speed it takes most of the people present a while to even wrap their heads around the news.

It 's Eren who speaks up first.

'Hold on, ' he says, interrupting the minute details Sirius is going over. 'Zeke 's mother is alive? '

'Yes, ' Erwin says. He seems fairly casual about the fact, as if it 's something he 's been quietly theorising himself.

'Does anyone else in Varsiko know? '

'Darius Zackly, evidently, as the letters Sirius- '

'

His grace,

' Sirius emphasises with a sour face. 'I have not given you permission to call me by my name. '

Erwin gives Sirius a small look. He looks equal parts amused and playfully exasperated.

'Alright, then. My apologies. The letters

his grace

sent to the czar where he offered up Dina Yeager were re-routed to Darius Zackly. Thus, if he didn 't know before, he knows now. I suspect he had a hunch prior, though. '