Thread:Shikifan/@comment-29427540-20180524160957/@comment-27727635-20180528091849

to go further  all 2016 fgo summer are servant appeared during 2015

and all 2017 fgo summer servant are appeared  the 7 first months of 2016 (except Nobu)

so maybe the fgo summer servant 2018 are appeared in 2017

but it's just a hypothesis  XD