User blog comment:Hayashi H/Spring 2016 Event Guide/@comment-26486243-20160524084300/@comment-26082413-20160525165712

Is it the only formation that drops Oyashio ? i'm currently on the 55 sortie and she didnt show up at all, and i dropped the even lower chances Akitsushima and Taigei(accordingly to poi statistics, I'm farming her currently after i cleared E7 on easy.