Did Vermouth knew the Akai Family?

[Aries Bless]

I think Vermouth knew the Akai family in the past. During the mystery train case, Vermouth, as Scar Akai, said to Sera 'You haven't change at all, Masumi.' Not matte how well Vermouth can impersonate Akai, she would have no way of knowning how Sera was in the past and say with such confidents that she hasn't changed, if they have never met before, since I except that Akai keep his family and his job as FBI agent very much apart. Therefore I think that at some point in the past Vermouth have met Sera once.

[MeiTanteixX]

Bourbon told her that Akai's sister was in Japan, and that she might become an obstacle in catching Sherry. With that information, Vermouth just needs to improvise and act like her brother, simple as that.

[TheSilverBoy]

how the BO know The true identity of akai?

the FBI agent described a vermouth skills disguise, it is wonderful

so maybe after an old man reported Gin about akai before he met him maybe the Bo started investigated about The true identity of akai and his family and history