is Frau a former of ayanami's team?

I ask this because Frau has verloren sickle. and ayanami ever сказал(-а) "save that sickle, that's considerable" and once of ayanami team ever сказал(-а) " he contaminate ayanami's sickle". i aspire how frau get the sickle? is he a former of ayanami's team member?